0 – Wikipedia

0 (zero) is both a number and the numerical digit used to represent that number in numerals.The number 0 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. Names for the number 0 in English include zero, nought (UK), naught (US) (/ n ɔː t /), nil, or …

: https://en.wikipedia.org/wiki/0_(number)