Factorial (C PROGRAM)

Write a program that reads a nonnegative integer and computes and prints its factorial. The factorial of a nonnegative integer n is written n! (pronounced n factorial) and is defined as follows:

 n! = n*(n-1)*(n-2)*...*1 (for values of n greater than or equal to 1) and n! = 1 (for n=0). 

For example, 5! = 5 4 3 2 1, which is 120.

_____________________________________________________________________

Example Output:

Enter an integer

5 ** user input**

5! = 120