Program to find factorial of number

In this example, We will learn a program to find factorial of number using loop. Before that, You must have knowledge in following topics

• Introduction
• For Loop

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Algorithm

This is the algorithm of program to find factorial of a number

Step 1: Start

Step 2: Initialize 3 variables fact = 1, i and n

Step 3: Take input from user and assign to variable n

Step 4: Assign i  = 1

Step 5: Repeat this STEP until i <= n

Step 5.1: fact = fact * i

Step 5.2: i++

Step 6: Print fact

Step 7: End

Flowchart

This is the flowchart of program to find factorial of a number

CODE: Program to find factorial of number

We will find factorial of number using for loop.

#include<stdio.h>

int main(){

    int fact, i, n;
    fact = 1;

    printf("Enter the number : ");
    scanf("%d" , &n);

    for(i = 1; i <= n; i++){
        fact = fact*i;
    }

    printf("\nFactorial of %d is %d", n , fact);

    return 0;

}

The output of above program is

Enter the number : 5
Factorial of 5 is 120