Programming language is C++

The factorial of a nonnegative integer nis written as n! (pronounced "n factorial") and is defined as follows: ni nin-1). In - 2) .... 1 (for values of n greater than or equal to 1) and n/ 1 (for no) For example, 5!-5.4.3.2.1, which is 120. Write a program that reads a nonnegative integer and computes and prints its factorial