#include <stdio.h>
int factorial(int n);
int main() {
int n;
printf("Enter a integer: ");
scanf("%d", &n);
printf("Factorial of %d is %d\n"
, n, factorial(n));
return 0;
}
int factorial(int n) {
if (n == 0) {
return 1;
} else {
return n * factorial(n-1);
}
}