fectorialItt.c

#include <stdio.h> 


 int factorial( int n) 
{ 
	int res = 1, i; 
	for (i = 2; i <= n; i++) 
		res *= i; 
	return res; 
} 

int main() 
{ 
	int num ;
    printf("enter no : ");
    scanf("%d",&num);
	printf( 
		"Factorial of %d is %d  ", num, factorial(num)); 
	return 0; 
}