Factorial program in C

Factorial Program in C .

the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n. For example,

5! = 5  \times  4  \times  3  \times  2  \times  1 = 120.  \

The value of 0! is 1

C program to find factorial of a number using recursion .