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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
Updated on: 13-Mar-2020
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