👉 In mathematics, a zero of a function is an input value for which the output of the function equals zero. For example, if we have the equation f(x) = 0, then x = 0 is considered a zero of the function f(x). The set of all zeros of a function is often denoted by the symbol Z(f), and it contains all values that make the function equal to zero. In more advanced mathematical contexts, such as calculus or linear algebra, the term "