C program to find factorial of a number

Example

Input

Input number: 5

Output

Factorial: 120

/**
 * C program to calculate factorial of a number
 */

#include <stdio.h>

int main()
{
    int i, num;
    unsigned long long fact=1LL;

    /* Input number from user */
    printf("Enter any number to calculate factorial: ");
    scanf("%d", &num);

    /* Run loop from 1 to num */
    for(i=1; i<=num; i++)
    {
        fact = fact * i;
    }

    printf("Factorial of %d = %llu", num, fact);

    return 0;
}

/*
Output :

Enter any number to calculate factorial: 5
Factorial of 5 = 120
*/