Question

I am trying to write an if-else statement in Java with 7 different variables, initialized and declared as integers. I want to write an if-else statement that says "You win!" if their sum equals 21, but says "Sum does not equal 21, exiting program." otherwise. If the sum does not equal 21, then I would need to close the keyboard as well.

Answer 1

Below is your code:

import java.util.Scanner;

public class SumOfNumbers {
        public static void main(String[] args) {
                // initializing keyboard
                Scanner keyboard = new Scanner(System.in);
                // declaring 7 different variables
                int var1, var2, var3, var4, var5, var6, var7;

                // getting input from user for 7 variables
                System.out.print("Enter number #1: ");
                var1 = keyboard.nextInt();
                System.out.print("Enter number #2: ");
                var2 = keyboard.nextInt();
                System.out.print("Enter number #3: ");
                var3 = keyboard.nextInt();
                System.out.print("Enter number #4: ");
                var4 = keyboard.nextInt();
                System.out.print("Enter number #5: ");
                var5 = keyboard.nextInt();
                System.out.print("Enter number #6: ");
                var6 = keyboard.nextInt();
                System.out.print("Enter number #7: ");
                var7 = keyboard.nextInt();

                // calculating sum
                int sum = var1 + var2 + var3 + var4 + var5 + var6 + var7;

                // printing result
                if (sum == 21) {
                        System.out.println("You win!");
                } else {
                        System.out.println("Sum does not equal 21, exiting program.");
                }

                // closing keyboard
                keyboard.close();
        }
}

Output

Enter number #1: 21
Enter number #2: 45
Enter number #3: 1
Enter number #4: 6
Enter number #5: 8
Enter number #6: 14
Enter number #7: 54
Sum does not equal 21, exiting program.