Simple Factorial Program In C

Source Code:

// simple factorial program in c
#include <stdio.h>

// declation of fact function
int fact(int num);

    // body of factorial function 
    int fact(int num){

    //declration of variables
    int i;

    //for loop to perform factorial
    for(i = num - 1; i < num && i != 0; i--){
        num = num * i;
    }

    //returning the factorial 
    return num;
}

// main function 
void main(){

    // delaration of variables
    int num = 0, facto = 0;

    // number input statement for fatorial 
    printf("\nEnter number for factorial:");
    scanf("%d",&num);

    // calling fact and and assigne return fact 
    // to the facto variable
    facto = fact(num);

    //statement to print the number with their factorial
    printf("\nFactorial of %d is %d.",num,facto);
}

Input:

Enter number for factorial:4

Output:

Factorial of 4 is 24.