Factorial of a number

Find Factorial of given number

• The product of an integer and all the integers below it can be referred as factorial.

Ex: 3! = 3*2*1

import java.util.stream.LongStream;

public class Factorial {

    public static void main(String[] args) {
    // 4!=4*3*2*1
    int n = 5;
    int f = 1;
    for (int i = 1; i <= n; i++) {
        f = f * i;
    }

    System.out.println("Factorial of given number using for loop=" + f);

    long u = LongStream.rangeClosed(1, n).reduce(1, (long a, long b) -> a * b);
    System.out.println("Factorial of given number using java 8=" + u);

    System.out.println("Factorial of given number using recursive=" + factRecursive(n));
  }

    public static int factRecursive(int n) {
        return n == 1 ? 1 : n * factRecursive(n - 1);
    }
}

Output:

Factorial of a number
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