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# Java program to calculate the factorial of a given number using while loop

A factorial of a particular number (n) is the product of all the numbers from 0 to n (including n) i.e. Factorial of the number 5 will be 1*2*3*4*5 = 120.

- To find the factorial of a given number.
- Create a variable factorial initialize it with 1.
- start while loop with condition i (initial value 1) less than the given number.
- In the loop, multiple factorials with i and assign it to factorial and increment i.
- Finally, print the value of factorial.

## Example

import java.util.Scanner; public class FactorialWithWhileLoop { public static void main(String args[]){ int i =1, factorial=1, number; System.out.println("Enter the number to which you need to find the factorial:"); Scanner sc = new Scanner(System.in); number = sc.nextInt(); while(i <=number) { factorial = factorial * i; i++; } System.out.println("Factorial of the given number is:: "+factorial); } }

## Output

Enter the number to which you need to find the factorial: 5 Factorial of the given number is:: 120

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