0
−1 0 1 2 3 4 5 6 7 8 9 → List of numbers — Integers 0 10 20 30 40 50 60 70 80 90 →
Cardinal	0, zero, "oh" ( /ˈoʊ/), nought, naught, nil.
Ordinal	0th, zeroth, noughth
Factorization	Failed to parse (Missing texvc executable; please see math/README to configure.): 0
Divisors	all numbers
Arabic	٠,0
Bengali	০
Devanāgarī	०
Chinese	零, 〇
Japanese	零, 〇
Khmer	០
Thai	๐
Binary	0
Octal	0
Duodecimal	0
Hexadecimal	0

0 (zero; BrE: /ˈzɪərəʊ/, ZIRR-oh or AmE: /ˈziːroʊ/, ZEER-oh) is both a number^[1] and the numerical digit used to represent that number in numerals. It fulfills a central role in mathematics as the additive identity of the integers, real numbers, and many other algebraic structures. As a digit, 0 is used as a placeholder in place value systems. In the English language, 0 may be called zero, nought or (US) naught ( /ˈnɔːt/), nil, or "o" ( /ˈoʊ/). Informal or slang terms for zero include zilch and zip.^[2] Ought or aught ( /ˈɔːt/) have also been used historically.^[3] (See Names for the number 0 in English)

Etymology[link]

The word zero came via French zéro from Venetian zero, which (together with cypher) came via Italian zefiro from Arabic صفر, ṣafira = "it was empty", ṣifr = "zero", "nothing". This was a translation of the Sanskrit word shoonya (śūnya), meaning "empty".^[4][5][6][7]

History[link]

Mesopotamia[link]

By the middle of the 2nd millennium BC, the Babylonian mathematics had a sophisticated sexagesimal positional numeral system. The lack of a positional value (or zero) was indicated by a space between sexagesimal numerals. By 300 BC, a punctuation symbol (two slanted wedges) was co-opted as a placeholder in the same Babylonian system. In a tablet unearthed at Kish (dating from about 700 BC), the scribe Bêl-bân-aplu wrote his zeros with three hooks, rather than two slanted wedges.^[8]

The Babylonian placeholder was not a true zero because it was not used alone. Nor was it used at the end of a number. Thus numbers like 2 and 120 (2×60), 3 and 180 (3×60), 4 and 240 (4×60), looked the same because the larger numbers lacked a final sexagesimal placeholder. Only context could differentiate them.

India[link]

The concept of zero as a number and not merely a symbol for separation is attributed to India, where, by the 9th century AD, practical calculations were carried out using zero, which was treated like any other number, even in case of division.^[9][10] The Indian scholar Pingala (circa 5th-2nd century BC) used binary numbers in the form of short and long syllables (the latter equal in length to two short syllables), making it similar to Morse code.^[11][12] He and his contemporary Indian scholars used the Sanskrit word śūnya to refer to zero or void. The use of a blank on a counting board to represent 0 dated back in India to 4th century BC.^[13] In 498 AD, Indian mathematician and astronomer Aryabhata stated that "Sthanam sthanam dasa gunam" or place to place in ten times in value, which is the origin of the modern decimal-based place value notation.^[14]

The oldest known text to use a decimal place-value system, including a zero, is the Jain text from India entitled the Lokavibhâga, dated 458 AD, where shunya ("void" or "empty") was employed for this purpose.^[15] The first known use of special glyphs for the decimal digits that includes the indubitable appearance of a symbol for the digit zero, a small circle, appears on a stone inscription found at the Chaturbhuja Temple at Gwalior in India, dated 876 AD.^[16][17] There are many documents on copper plates, with the same small o in them, dated back as far as the sixth century AD, but their authenticity may be doubted.^[8]

China[link]

Since the 4th century BC, counting rods were used in China for decimal calculations including the use of blank spaces. Chinese mathematicians understood negative numbers and zero, some mathematicians indicated the for the latter with wúrù (無入 "no entry"), kōng (空 "empty") and the frame-like symbol 口/囗, until Gautama Siddha introduced the symbol 0 in the 8th century.^[18][19]

Prior to that, The Nine Chapters on the Mathematical Art, composed in the 1st century AD, had already explicitly stated "[when subtracting] subtract same signed numbers, add differently signed numbers, subtract a positive number from zero to make a negative number, and subtract a negative number from zero to make a positive number."^[20]

The Arab world[link]

The Hindu-Arabic numerals and the positional number system were introduced around 500 AD, and in 825 AD, it was introduced by a Persian scientist, al-Khwārizmī,^[21] in his book on arithmetic. This book synthesized Greek and Hindu knowledge and also contained his own fundamental contribution to mathematics and science including an explanation of the use of zero. It was only centuries later, in the 12th century, that the Arabic numeral system was introduced to the Western world through Latin translations of his treatise Arithmetic.

Greeks and Romans[link]

Records show that the ancient Greeks seemed unsure about the status of zero as a number. They asked themselves, "How can nothing be something?", leading to philosophical and, by the Medieval period, religious arguments about the nature and existence of zero and the vacuum. The paradoxes of Zeno of Elea depend in large part on the uncertain interpretation of zero.

Example of the early Greek symbol for zero (lower right corner) from a 2nd century papyrus

By 130 AD, Ptolemy, influenced by Hipparchus and the Babylonians, was using a symbol for zero (a small circle with a long overbar) within a sexagesimal numeral system otherwise using alphabetic Greek numerals. Because it was used alone, not just as a placeholder, this Hellenistic zero was perhaps the first documented use of a number zero in the Old World. However, the positions were usually limited to the fractional part of a number (called minutes, seconds, thirds, fourths, etc.)—they were not used for the integral part of a number. In later Byzantine manuscripts of Ptolemy's Syntaxis Mathematica (also known as the Almagest), the Hellenistic zero had morphed into the Greek letter omicron (otherwise meaning 70).

Another zero was used in tables alongside Roman numerals by 525 (first known use by Dionysius Exiguus), but as a word, nulla meaning "nothing", not as a symbol. When division produced zero as a remainder, nihil, also meaning "nothing", was used. These medieval zeros were used by all future medieval computists (calculators of Easter). The initial "N" was used as a zero symbol in a table of Roman numerals by Bede or his colleague around 725.

The Americas[link]

The back of Olmec stela C from Tres Zapotes, the second oldest Long Count date discovered. The numerals 7.16.6.16.18 translate to September, 32 BC (Julian). The glyphs surrounding the date are thought to be one of the few surviving examples of Epi-Olmec script.

The Mesoamerican Long Count calendar developed in south-central Mexico and Central America required the use of zero as a place-holder within its vigesimal (base-20) positional numeral system. Many different glyphs, including this partial quatrefoil——were used as a zero symbol for these Long Count dates, the earliest of which (on Stela 2 at Chiapa de Corzo, Chiapas) has a date of 36 BC.^[22] Since the eight earliest Long Count dates appear outside the Maya homeland,^[23] it is assumed that the use of zero in the Americas predated the Maya and was possibly the invention of the Olmecs. Many of the earliest Long Count dates were found within the Olmec heartland, although the Olmec civilization ended by the 4th century BC, several centuries before the earliest known Long Count dates.s lacked a final sexagesimal placeholder. Only context could differentiate them.

Although zero became an integral part of Maya numerals, it did not influence Old World numeral systems. Quipu, a knotted cord device, used in the Inca Empire and its predecessor societies in the Andean region to record accounting and other digital data, is encoded in a base ten positional system. Zero is represented by the absence of a knot in the appropriate position.

As a number[link]

0 is the integer immediately preceding 1. In most cultures, 0 was identified before the idea of negative things (quantities) that go lower than zero was accepted. Zero is an even number,^[24] because it is divisible by 2. 0 is neither positive nor negative. By most definitions^[25] 0 is a natural number, and then the only natural number not to be positive. Zero is a number which quantifies a count or an amount of null size.

The value, or number, zero is not the same as the digit zero, used in numeral systems using positional notation. Successive positions of digits have higher weights, so inside a numeral the digit zero is used to skip a position and give appropriate weights to the preceding and following digits. A zero digit is not always necessary in a positional number system, for example, in the number 02. In some instances, a leading zero may be used to distinguish a number.

As a year label[link]

In the BC calendar era, the year 1 BC is the first year before AD 1; no room is reserved for a year zero. By contrast, in astronomical year numbering, the year 1 BC is numbered 0, the year 2 BC is numbered −1, and so on.^[26]

Names and symbols[link]

In 976 AD the Persian encyclopedist Muhammad ibn Ahmad al-Khwarizmi, in his "Keys of the Sciences", remarked that if, in a calculation, no number appears in the place of tens, then a little circle should be used "to keep the rows". This circle the Arabs called صفر ṣifr, "empty". That was the earliest mention of the name ṣifr that eventually became zero.^[21]

Italian zefiro already meant "west wind" from Latin and Greek zephyrus; this may have influenced the spelling when transcribing Arabic ṣifr.^[27] The Italian mathematician Fibonacci (c.1170–1250), who grew up in North Africa and is credited with introducing the decimal system to Europe, used the term zephyrum. This became zefiro in Italian, which was contracted to zero in Venetian.

As the decimal zero and its new mathematics spread from the Arab world to Europe in the Middle Ages, words derived from ṣifr and zephyrus came to refer to calculation, as well as to privileged knowledge and secret codes. According to Ifrah, "in thirteenth-century Paris, a 'worthless fellow' was called a '... cifre en algorisme', i.e., an 'arithmetical nothing'."^[27] From ṣifr also came French chiffre = "digit", "figure", "number", chiffrer = "to calculate or compute", chiffré = "encrypted". Today, the word in Arabic is still ṣifr, and cognates of ṣifr are common in the languages of Europe and southwest Asia.

The modern numerical digit 0 is usually written as a circle or ellipse. Traditionally, many print typefaces made the capital letter O more rounded than the narrower, elliptical digit 0.^[28] Typewriters originally made no distinction in shape between O and 0; some models did not even have a separate key for the digit 0. The distinction came into prominence on modern character displays.^[28]

A slashed zero can be used to distinguish the number from the letter. The digit 0 with a dot in the center seems to have originated as an option on IBM 3270 displays and has continued with the some modern computer typefaces such as Andalé Mono. One variation uses a short vertical bar instead of the dot. Some fonts designed for use with computers made one of the capital-O–digit-0 pair more rounded and the other more angular (closer to a rectangle). A further distinction is made in falsification-hindering typeface as used on German car number plates by slitting open the digit 0 on the upper right side. Sometimes the digit 0 is used either exclusively, or not at all, to avoid confusion altogether.

Rules of Brahmagupta[link]

The rules governing the use of zero appeared for the first time in Brahmagupta's book Brahmasputha Siddhanta (The Opening of the Universe),^[29] written in 628 AD. Here Brahmagupta considers not only zero, but negative numbers, and the algebraic rules for the elementary operations of arithmetic with such numbers. In some instances, his rules differ from the modern standard. Here are the rules of Brahmagupta:^[29]

• The sum of zero and a negative number is negative.
• The sum of zero and a positive number is positive.
• The sum of zero and zero is zero.
• The sum of a positive and a negative is their difference; or, if their absolute values are equal, zero.
• A positive or negative number when divided by zero is a fraction with the zero as denominator.
• Zero divided by a negative or positive number is either zero or is expressed as a fraction with zero as numerator and the finite quantity as denominator.
• Zero divided by zero is zero.

In saying zero divided by zero is zero, Brahmagupta differs from the modern position. Mathematicians normally do not assign a value to this, whereas computers and calculators sometimes assign NaN, which means "not a number." Moreover, non-zero positive or negative numbers when divided by zero are either assigned no value, or a value of unsigned infinity, positive infinity, or negative infinity. Once again, these assignments are not numbers, and are associated more with computer science than pure mathematics, where in most contexts no assignment is done.

Zero as a decimal digit[link]

Positional notation without the use of zero (using an empty space in tabular arrangements, or the word kha "emptiness") is known to have been in use in India from the 6th century. The earliest certain use of zero as a decimal positional digit dates to the 5th century mention in the text Lokavibhaga. The glyph for the zero digit was written in the shape of a dot, and consequently called bindu ("dot"). The dot had been used in Greece during earlier ciphered numeral periods.

The Hindu-Arabic numeral system (base 10) reached Europe in the 11th century, via the Iberian Peninsula through Spanish Muslims, the Moors, together with knowledge of astronomy and instruments like the astrolabe, first imported by Gerbert of Aurillac. For this reason, the numerals came to be known in Europe as "Arabic numerals". The Italian mathematician Fibonacci or Leonardo of Pisa was instrumental in bringing the system into European mathematics in 1202, stating:

After my father's appointment by his homeland as state official in the customs house of Bugia for the Pisan merchants who thronged to it, he took charge; and in view of its future usefulness and convenience, had me in my boyhood come to him and there wanted me to devote myself to and be instructed in the study of calculation for some days. There, following my introduction, as a consequence of marvelous instruction in the art, to the nine digits of the Hindus, the knowledge of the art very much appealed to me before all others, and for it I realized that all its aspects were studied in Egypt, Syria, Greece, Sicily, and Provence, with their varying methods; and at these places thereafter, while on business. I pursued my study in depth and learned the give-and-take of disputation. But all this even, and the algorism, as well as the art of Pythagoras, I considered as almost a mistake in respect to the method of the Hindus (Modus Indorum). Therefore, embracing more stringently that method of the Hindus, and taking stricter pains in its study, while adding certain things from my own understanding and inserting also certain things from the niceties of Euclid's geometric art. I have striven to compose this book in its entirety as understandably as I could, dividing it into fifteen chapters. Almost everything which I have introduced I have displayed with exact proof, in order that those further seeking this knowledge, with its pre-eminent method, might be instructed, and further, in order that the Latin people might not be discovered to be without it, as they have been up to now. If I have perchance omitted anything more or less proper or necessary, I beg indulgence, since there is no one who is blameless and utterly provident in all things. The nine Indian figures are: 9 8 7 6 5 4 3 2 1. With these nine figures, and with the sign 0 ... any number may be written.^[30][31]

Here Leonardo of Pisa uses the phrase "sign 0", indicating it is like a sign to do operations like addition or multiplication. From the 13th century, manuals on calculation (adding, multiplying, extracting roots, etc.) became common in Europe where they were called algorismus after the Persian mathematician al-Khwārizmī. The most popular was written by Johannes de Sacrobosco, about 1235 and was one of the earliest scientific books to be printed in 1488. Until the late 15th century, Hindu-Arabic numerals seem to have predominated among mathematicians, while merchants preferred to use the Roman numerals. In the 16th century, they became commonly used in Europe.

In mathematics[link]

Elementary algebra[link]

The number 0 is the smallest non-negative integer. The natural number following 0 is 1 and no natural number precedes 0. The number 0 may or may not be considered a natural number, but it is a whole number and hence a rational number and a real number (as well as an algebraic number and a complex number).

The number 0 is neither positive nor negative and appears in the middle of a number line. It is neither a prime number nor a composite number. It cannot be prime because it has an infinite number of factors and cannot be composite because it cannot be expressed by multiplying prime numbers (0 must always be one of the factors).^[32] Zero is, however, even (see parity of zero).

The following are some basic (elementary) rules for dealing with the number 0. These rules apply for any real or complex number x, unless otherwise stated.

• Addition: x + 0 = 0 + x = x. That is, 0 is an identity element (or neutral element) with respect to addition.
• Subtraction: x − 0 = x and 0 − x = −x.
• Multiplication: x · 0 = 0 · x = 0.
• Division: ⁰⁄_x = 0, for nonzero x. But ^x⁄₀ is undefined, because 0 has no multiplicative inverse (no real number multiplied by 0 produces 1), a consequence of the previous rule; see division by zero.
• Exponentiation: x⁰ = ^x/_x = 1, except that the case x = 0 may be left undefined in some contexts; see Zero to the zero power. For all positive real x, 0^x = 0.

The expression ⁰⁄₀, which may be obtained in an attempt to determine the limit of an expression of the form ^f(x)⁄_g(x) as a result of applying the lim operator independently to both operands of the fraction, is a so-called "indeterminate form". That does not simply mean that the limit sought is necessarily undefined; rather, it means that the limit of ^f(x)⁄_g(x), if it exists, must be found by another method, such as l'Hôpital's rule.

The sum of 0 numbers is 0, and the product of 0 numbers is 1. The factorial 0! evaluates to 1.

Other branches of mathematics[link]

• In set theory, 0 is the cardinality of the empty set: if one does not have any apples, then one has 0 apples. In fact, in certain axiomatic developments of mathematics from set theory, 0 is defined to be the empty set. When this is done, the empty set is the Von Neumann cardinal assignment for a set with no elements, which is the empty set. The cardinality function, applied to the empty set, returns the empty set as a value, thereby assigning it 0 elements.
• Also in set theory, 0 is the lowest ordinal number, corresponding to the empty set viewed as a well-ordered set.
• In propositional logic, 0 may be used to denote the truth value false.
• In abstract algebra, 0 is commonly used to denote a zero element, which is a neutral element for addition (if defined on the structure under consideration) and an absorbing element for multiplication (if defined).
• In lattice theory, 0 may denote the bottom element of a bounded lattice.
• In category theory, 0 is sometimes used to denote an initial object of a category.
• In recursion theory, 0 can be used to denote the Turing degree of the partial computable functions.

Related mathematical terms[link]

• A zero of a function f is a point x in the domain of the function such that f(x) = 0. When there are finitely many zeros these are called the roots of the function. See also zero (complex analysis) for zeros of a holomorphic function.
• The zero function (or zero map) on a domain D is the constant function with 0 as its only possible output value, i.e., the function f defined by f(x) = 0 for all x in D. A particular zero function is a zero morphism in category theory; e.g., a zero map is the identity in the additive group of functions. The determinant on non-invertible square matrices is a zero map.
• Several branches of mathematics have zero elements, which generalise either the property 0 + x = x, or the property 0 × x = 0, or both.

In science[link]

Physics[link]

The value zero plays a special role for many physical quantities. For some quantities, the zero level is naturally distinguished from all other levels, whereas for others it is more or less arbitrarily chosen. For example, on the Kelvin temperature scale, zero is the coldest possible temperature (negative temperatures exist but are not actually colder), whereas on the Celsius scale, zero is arbitrarily defined to be at the freezing point of water. Measuring sound intensity in decibels or phons, the zero level is arbitrarily set at a reference value—for example, at a value for the threshold of hearing. In physics, the zero-point energy is the lowest possible energy that a quantum mechanical physical system may possess and is the energy of the ground state of the system.

Chemistry[link]

Zero has been proposed as the atomic number of the theoretical element tetraneutron. It has been shown that a cluster of four neutrons may be stable enough to be considered an atom in its own right. This would create an element with no protons and no charge on its nucleus.

As early as 1926, Professor Andreas von Antropoff coined the term neutronium for a conjectured form of matter made up of neutrons with no protons, which he placed as the chemical element of atomic number zero at the head of his new version of the periodic table. It was subsequently placed as a noble gas in the middle of several spiral representations of the periodic system for classifying the chemical elements.

In computer science[link]

The most common practice throughout human history has been to start counting at one, and this is the practice in early classic computer science programming languages such as Fortran and COBOL. However, in the late 1950s LISP introduced zero-based numbering for arrays while Algol 58 introduced completely flexible basing for array subscripts (allowing any positive, negative, or zero integer as base for array subscripts), and most subsequent programming languages adopted one or other of these positions. For example, the elements of an array are numbered starting from 0 in C, so that for an array of n items the sequence of array indices runs from 0 to n−1. This permits an array element's location to be calculated by adding the index directly to address of the array, whereas 1 based languages precalculate the array's base address to be the position one element before the first.

There can be confusion between 0 and 1 based indexing, for example Java's JDBC indexes parameters from 1 although Java itself uses 0-based indexing.

In databases, it is possible for a field not to have a value. It is then said to have a null value. For numeric fields it is not the value zero. For text fields this is not blank nor the empty string. The presence of null values leads to three-valued logic. No longer is a condition either true or false, but it can be undetermined. Any computation including a null value delivers a null result. Asking for all records with value 0 or value not equal 0 will not yield all records, since the records with value null are excluded.

A null pointer is a pointer in a computer program that does not point to any object or function. In C, the integer constant 0 is converted into the null pointer at compile time when it appears in a pointer context, and so 0 is a standard way to refer to the null pointer in code. However, the internal representation of the null pointer may be any bit pattern (possibly different values for different data types).

In mathematics Failed to parse (Missing texvc executable; please see math/README to configure.): -0 = 0 = +0 , both −0 and +0 represent exactly the same number, i.e., there is no "negative zero" distinct from zero. In some signed number representations (but not the two's complement representation used to represent integers in most computers today) and most floating point number representations, zero has two distinct representations, one grouping it with the positive numbers and one with the negatives; this latter representation is known as negative zero.

In other fields[link]

• In some countries and some company phone networks, dialing 0 on a telephone places a call for operator assistance.
• DVDs that can be played in any region are sometimes referred to as being "region 0"
• Roulette wheels usually feature a "0" space (and sometimes also a "00" space), whose presence is ignored when calculating payoffs (thereby allowing the house to win in the long run).
• In Formula One, if the reigning World Champion no longer competes in Formula One in the year following their victory in the title race, 0 is given to one of the drivers of the team that the reigning champion won the title with. This happened in 1993 and 1994, with Damon Hill driving car 0, due to the reigning World Champion (Nigel Mansell and Alain Prost respectively) not competing in the championship.

See also[link]

• Grammatical number
• Number theory
• Peano axioms
• Zeroth (Zero as an ordinal number)

Notes[link]

References[link]

This article is based on material taken from the Free On-line Dictionary of Computing prior to 1 November 2008 and incorporated under the "relicensing" terms of the GFDL, version 1.3 or later.

External links[link]

Wikimedia Commons has media related to: 0 (number)

Look up zero in Wiktionary, the free dictionary.

Wikiquote has a collection of quotations related to: Zero

• A History of Zero
• Zero Saga
• The History of Algebra
• Edsger W. Dijkstra: Why numbering should start at zero, EWD831 (PDF of a handwritten manuscript)
• "My Hero Zero" Educational children's song in Schoolhouse Rock!

• Zero on In Our Time at the BBC. (listen now)
• Texts on Wikisource:
  • Chisholm, Hugh, ed. (1911). "Zero". Encyclopædia Britannica (11th ed.). Cambridge University Press. 
  • "Zero". Encyclopedia Americana. 1920. vep:0 (lugu)

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Renato Zero is the stage name of Renato Fiacchini (born September 30, 1950), an Italian singer-songwriter and showman whose career spans a full 6 decades, from the 1960s to the 2010s, with 40 million records sold^[1]. Zero was born Renato Fiacchini in downtown Rome, in Via di Ripetta, next to the famed Via del Corso. He quit his studies early to devote himself to his true passion, the arts, more specifically playing music and singing - though initially with little success. From an early age, he would wear make-up and cross-dress. He replied to the criticisms he received (including the recurring insult Sei uno zero! - "You're a zero!") by taking on the pseudonym Renato Zero. He recorded his first songs in 1965: "Tu, sì", "Il deserto", "La solitudine", which were never issued. His first published single, "Non basta sai/In mezzo ai guai" (1967), sold a total of 20 copies and was quickly forgotten. He had several different jobs, including an appearance in an advertisement for ice-cream, work as a dancer in a TV show, playing and dancing in two musicals and a couple minor roles in two Fellini movies.

In the late 1960s/early 1970s Zero's career was given a boost by the glam-rock movement, from which he benefited with his sexual ambiguity and androgynous appearance. At the same time, this led him to being accused of emulating other celebrities like David Bowie and, in particular, other British singer Marc Bolan whom he looked a whole lot like. In 1973 he issued his first LP, No! Mamma, no! (recorded live), but still with little success. The follow-up Invenzioni met the same fate.

Birth of the "Zeromania"[link]

It was not until 1976 that he scored his first hit with the single "Madame", a collaboration with songwriter Franca Evangelisti and composer Piero Pintucci, with whom Zero continued to work in the years that followed. "Madame" and the album including it, Trapezio, established a regular and loyal audience for Zero. This was to increase exponentially in the following years, until he could boast a huge following of die-hard fans that he dubbed Sorcini ("Little Mice"). His greatest hits at the time, all of them topping and breaking the Italian charts for quite some time, were lurid, only partly veiled recounts of extreme life in the sex-crazed 1970s: "Mi vendo" (a transvestite hooker's anthem), "Il triangolo" (a threesome's tale), and "SessoOEsse" (S.O.S. spelled like "Sex-or-S"), all set to a Bee Gees-like disco beat that was trendy at the time, were, and still are, really popular in Italy, and were among all disco clubs playlists. He also became friends at the time with french chanteuse and disco-queen Amanda Lear,Gay French icon.

The late 1970s were indeed years of great success for Zero's character, with the LPs Zerofobia ("Zerophobia", 1977), Zerolandia (1978) and Erozero (1979) topping the Italian charts. At this time Renato Zero was amongst the two or three most popular singers in Italy and his song "Il Carrozzone" was already regarded, also by critics, as one of the best Italian songs ever.

The name Zerolandia referred also to the moving theatre (a circus tent with a capacity of 5,000) in which he gave shows throughout Italy. On numerous occasions fans would participate in the gigs, made-up like Zero and dressed in his typical bird-like and strass-decorated costumes.

In 1979 Zero played as himself in the movie Ciao Nì (his usual greeting to his fans, which can be roughly translated as "Hi pal!"). In Italy this film grossed more than the American blockbuster Superman.

The 1980s: career dip[link]

In the 1980s he began to abandon make-up and greasepaint, but this did not rid Zero of his mania for grandeur: in the 1980 tour, for example, he entered the scene riding a white horse. In 1982 he began a collaboration with the opera director Renato Serio, who was to write the string arrangements for almost all of Zero's following LPs. In late 1983 he took part in RAI's Fantastico 3, then the most popular Italian TV show.

His career continued to be successful until 1984, with top-charts songs like "Amico" ("Friend") and "Spiagge" ("Beaches"). That year, however, his album Leoni si nasce and the tour of the same name, in which he appeared disguised as a lion and escorted by four aborigines, were commercial failures. The album Zero of 1987 marked the lowest point of his career: instead of playing in arenas and stadiums, Zero had to sing almost for free in the piazzas and discos of Italy's minor cities.

1990s: The comeback[link]

In 1991 Renato Zero participated to the Sanremo Music Festival with "Spalle al muro", and from that moment on his career began to rise again. In 1993 he ranked #1 on the Italian charts with the LP Quando non sei più nessuno. The following year Imperfetto repeated this success. During his tour concerts would regularly sell out, and he returned to his famous dress changes during the spectacles, although in a more balanced style.

In the mid-90s Zero dubbed the character of Jack Skellington and sang the songs in the Italian release of Tim Burton's The Nightmare Before Christmas.^[2]

In 1999, he sang at Pavarotti and Friends his hit song Il cielo together with tenor Luciano Pavarotti, and later the same year, Italian diva Mina paid him a tribute with her album Mina n° 0, containing nine Zero's songs, including one sung in duet with him.

2000s: the Emperor's Reign[link]

In 2004 his tour "Cattura il sogno/Il sogno continua" (Catch the dream/The dream continues) was awarded from Pollstar magazine as the most successful of the year in Italy and as well as one of the most successful worldwide (#30). The recording of the Roman concerts, held at Olimpico Stadium in June, was the best sold musical DVD of 2004.

In 2005 he took part to the Italian stage of Live 8, in the Circo Massimo. In November his new album Il dono ("The Gift") topped the charts and maintained #1 until the end of the year. In December 2005 he performed in the Vatican with a song dedicated to Pope John Paul II. Renato Zero's 2006 tour was entitled Zero movimento and involved 25 concerts. After 40 years of musical career, in February 2006 he refused the Career Award of the national Festival of San Remo, stating that should be for artists at an old age.

During some concerts held at the time of the campaign for the April 2006 elections, he declared himself against (right-wing) former Prime Minister Silvio Berlusconi.

In 2007 he toured again in major Italian cities, filling the biggest sports stadiums. The tour was called MpZerO, and attracted 270,000 spectators on 7 dates, of which 120,000 filled the Olympic Stadium of Rome, his hometown. He's often called the Emperor of Rome.

"Presente", his 30th album, released in Europe, South America and North America March 20, 2009, caused him to gain 5 discs of platinum in Italy and 80,000 copies sold out by Italy. Following Presente release, Renato toured again in autumn 2009: "Zeronove tour" collected 30 sold-out dates, most successful gig of the year in Italy. On December 10, "Ancora qui", the first single from the album "Presente", won the best Italian video of the year. In September 2010 "Presente" (cd edition + special cd+dvd edition) was certified by FIMI as the highest selling album in Italy during 2009–2010 years.

Zero's accomplishments[link]

Renato Zero is still the only Italian artist to have reached the number one charts position of singles in 4 different decades (70's, 80's, 90's and 2000's). He had no fewer than 26 albums in the Top 10.

He likes to work with other artists, and wrote songs for numerous other singers as well. With his particular approach in performances, shows and tours, he is a leading live performer in his country and obtained a unique spot in the Italian musical scene. Throughout his career, Renato Zero has been a crusader against drug abuse. His grand force is regarded to be having shown the normality of the diverse, convincing the public that diversity feeds our human abilities to feel and act with love, respect, solidarity and faith.

Personal life[link]

Zero has never either admitted nor denied being gay and he avoids the subject although the general consesus is that he is gay, albeit a conservative one, who fancies no outings and no public displays of it except in his art. His image has changed thru the decades, from the flamboyant, make-up wearing transvestite of the mid 1970s, reminiscent of Marc Bolan or Rocky Horror Picture Show's Frank'n'Furter, to today's somber, blue suit-clad icon of no specific gender and unspecified age, his only allowance to fancifulness, a casque of jet-black hair and a thin veil of foundation and lipgloss.

Discography[link]