Factorial of a number in java without recursion | Iterative approach | while loop

In this tutorial, we will find factorial of a entered number iteratively.

Steps:

• Firstly, we will create a noRecursion method having parameter n.
• Initialize fact = 1.
• Start a while loop until, n>0
• While loop will be executed until step 3 condition is true.
• When n == 0 , while loop turns false, return fact.
• Then, we will store returned value from noRecursion method into result datatype. (as show in main() method).
• At last, print the result.

Code Approach:(JAVA)

package Recursion;

import java.util.Scanner;

public class Factorial {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter a number: ");
        int n = sc.nextInt();
        int result = noRecursion(n);
        System.out.println("Factorial of "+n+": " + result);
    }

    public static int noRecursion(int n) {
        int fact = 1;
        while (n > 0) {
            fact *= n;
            n--;
        }
        return fact; // this will return the ans;
    }
}

Output:

Enter a number: 7
Factorial of 7: 5040