1 (one;  /ˈwʌn/ or UK /ˈwɒn/) is a number, a numeral, and the name of the glyph representing that number. It represents a single entity, the unit of counting or measurement. For example, a line segment of "unit length" is a line segment of length 1.

One, sometimes referred to as unity, is the integer before two and after zero. One is the first non-zero number in the natural numbers as well as the first odd number in the natural numbers.

Any number multiplied by one is the number, as one is the identity for multiplication. As a result, one is its own factorial, its own square, its own cube, and so on. One is also the empty product, as any number multiplied by one is itself, which produces the same result as multiplying by no numbers at all.

The glyph used today in the Western world to represent the number 1, a vertical line, often with a serif at the top and sometimes a short horizontal line at the bottom, traces its roots back to the Indians, who wrote 1 as a horizontal line, much like the Chinese character 一. The Gupta wrote it as a curved line, and the Nagari sometimes added a small circle on the left (rotated a quarter turn to the right, this 9-look-alike became the present day numeral 1 in the Gujarati and Punjabi scripts). The Nepali also rotated it to the right but kept the circle small. This eventually became the top serif in the modern numeral, but the occasional short horizontal line at the bottom probably originates from similarity with the Roman numeral Failed to parse (Missing texvc executable; please see math/README to configure.): \mathrm{I} . In some European countries (e.g., Germany), the little serif at the top is sometimes extended into a long upstroke, sometimes as long as the vertical line, which can lead to confusion with the glyph for seven in other countries. Where the 1 is written with a long upstroke, the number 7 has a horizontal stroke through the vertical line.

Anil Kapoor (Hindi: अनिल कपूर; Punjabi: ਅਨਿਲ ਕਪੂਰ; born 24 December 1959) is an Indian actor, producer and director who has appeared in many Bollywood films and more recently international films.

He won his first Filmfare Award, in the Best Supporting Actor category, for his role in Yash Chopra's Mashaal (1984). Kapoor earned his first Filmfare Best Actor Award for his performance in N. Chandra's Tezaab (1988) and later again for his perfornance in Indra Kumar's Beta (1992). He also starred in many other critically and commercially successful films, including Woh Saat Din (1983), Meri Jung (1985), Janbaaz (1986), Karma (1986), Mr. India (1987), Virasat (1997) for which he won the Filmfare Critics Award for Best Actor, Biwi No.1 (1999), Taal (1999) for which he won his second Filmfare Best Supporting Actor Award, Pukar (2000) for which he won his first National Film Award for Best Actor, No Entry (2005), and Welcome (2007).

Kapoor's first role in an international film was in Danny Boyle's 2008 Academy Award-winning film Slumdog Millionaire, for which he shared the Screen Actors Guild Award for Outstanding Performance by a Cast in a Motion Picture. His performance in the eighth season of the action series 24 generated rave reviews from the American press. Globally, Anil Kapoor is one of the most recognised Indian actors. He has also appeared in the 2011 film Mission: Impossible – Ghost Protocol.