Summary: Factorial is represented using '!', so

five factorial will be written as (5!),

n factorial as (n!).

n! = n*(n-1)*(n-2)*(n-3)...3.2.1

and zero factorial is defined as one i.e. 0! = 1.

*/

#include <stdio.h>

int main()

{

int c, n, fact = 1;

printf("Enter a number to calculate it's factorial\n");

scanf("%d", &n);

for (c = 1; c <= n; c++)

fact = fact * c;

printf("Factorial of %d = %d\n", n, fact);

return 0;

}

_______________________________OUPUT______________________________

Enter a number to calculate it's factorial

23

Factorial of 23 = 862453760

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