Write a Program find Factorial of Number in java- Technology369kk

 Factorial of Numbers in java

Program 

// Q. Write a program simple find factorial of a random number get input

import java.util.*;

import java.util.Scanner;

class factorialNum{

    public static void main(String arg[]){

        int num,i,factNum=1;          //Declaration of all variable

       

        System.out.println("Enter a Number for Factorial: ");

        Scanner sc = new Scanner(System.in);

        num = sc.nextInt();

        if(num <= 0)

            System.out.println("Number Should be neagtive.");

        else

        {

        for (i=1; i<=num; i++)

        factNum *= i;           //this is only logic for factorial down

        System.out.println("Factorial of "+num+ " is :"+factNum);

        }

        sc.close();

    }

}

Output: 

PS D:\Learning File\BCA\BCA 3rd Sem\JAVA OOP\allpraque> java factorialNum

Enter a Number for Factorial:

5

Factorial of 5 is :120