Example: C program to find the factorial of a number using for loop

C
C++
C#
Java
Python
PHP

// C program to find the factorial of a number using for loop
#include <stdio.h>

int main() {
    int x, i;
    unsigned long long f = 1;
    // x denotes input number
    // f denotes factorial value

    printf("Enter an integer to find the fact::\n");
    scanf("%d", &x);

    if (x > 0) {
        for (i = 1; i <= x; ++i) {
            f *= i;
        }
        printf("Factorial of %d = %llu\n", x, f);
    } else {
        printf("Sorry, input number should be positive number greater than 1!");
    }

    return 0;
}