Calculate Factorial of Number in Java Programming

Here, we have listed How To Calculate Factorial of Number in Java Programming Language. It is important that we should know How A For Loop Works before getting further with the Java Program Code.

What is a Factorial of an Integer?

A Factorial for a Non-Negative Number or Integer is the Product of all the Positive Integers Less than or Equal to that Number.

Example

6! = 6 * 5 * 4 * 3 * 2 * 1 = 720

Also Read: Java Program To Find Palindrome Numbers

Method 1: Calculate Factorial of Number in Java using While Loop

import java.io.*;

class Factorial

{

public static void main(String args[]) throws Exception

{

int fact = 1, num, count;

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

System.out.println("\nEnter an Integer:");

num = Integer.parseInt(br.readLine());

for(count = num;count > 0;count--)

{

fact = fact * count;

}

System.out.println("\nFactorial of " + num + ":\t" + fact);

}

Output

Calculate Factorial of Number in Java Programming

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Calculate Factorial of Number in Java