Question

Create another method: getFactorial(int num) that calculates a Product of same numbers, that Sum does for summing them up. (1,2,3 ... num) Make sure you use FOR loop in it, and make sure that you pass a number such as 4, or 5, or 6, or 7 that you get from a Scanner, and then send it as a parameter while calling getFactorial(...) method from main().

Answer 1

Answer:

The program in Java is as follows;

import java.util.*;

public class Main{

public static int getFactorial(int num){

    int fact = 1;

    for(int i =1;i<=num;i++){

        fact*=i;

    }

    return fact;

}

public static void main(String[] args) {

 Scanner input = new Scanner(System.in);

 System.out.print("Number: ");

 int num = input.nextInt();  

 System.out.println(num+"! = "+getFactorial(num)); }}

Explanation:

The method begins here

public static int getFactorial(int num){

This initializes the factorial to 1

    int fact = 1;

This iterates through each digit of the number

    for(int i =1;i<=num;i++){

Each of the digits are then multiplied together

        fact*=i;     }

This returns the calculated factorial

    return fact; }

The main begins here

public static void main(String[] args) {

 Scanner input = new Scanner(System.in);

This prompts the user for number

 System.out.print("Number: ");

This gets input from the user

 int num = input.nextInt();  

This passes the number to the function and also print the factorial

 System.out.println(num+"! = "+getFactorial(num)); }}