Calculators & Converters

    What is 1! - Factorial for integer 1?

    Factorial Calculator's Factorial Calculator is to find what is 1! - Factorial for 1? 1 is the factorial for integer number 1.

    Definition and Formula

    Factorial is a basic mathematic function often represented by n! in mathematics, represents the product of all integers less than or equal to the positive integer n. An important function frequently used in combinatorics (permutations and combinations) theory.
    For example, 1! can be written as
    1! = 1
    1! = 1 Calculators