Java Ice Breakers

How to find factorial of a number using Stream

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by

anagendrakumar2020

This is the fifth solution to find the factorial of a number using Stream. This program uses the LongStream, range(), reduce() methods.

import java.util.Scanner;
import java.util.stream.LongStream;

public class FactorialUsingStreams {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		@SuppressWarnings("resource")
		Scanner inpInt = new Scanner(System.in);
		System.out.print("Enter a number= ");
		int numValue = inpInt.nextInt();
		System.out.println(
				"Factorial of " + numValue + " is " + LongStream.range(1, numValue + 1).reduce(1, (a, b) -> (a * b)));
	}
}

OUTPUT-
Enter a number= 9
Factorial of 9 is 362880