Factorial Number: The product of an integer and all the integers below it; e.g. factorial four ( 4! ) is equal to 24.
4! = 4 × 3 × 2 × 1 = 24
Code
#include <stdio.h>
unsigned long long int factorial(unsigned int i) {
if(i <= 1) {
return 1;
}
return i * factorial(i - 1);
}
int main() {
int i = 12;
printf("Factorial of %d is %d\n", i, factorial(i));
return 0;
}
