Using Java

Sum of two numbers without User input

public class AddTwoNumbers {

   public static void main(String[] args) {
        
      int num1 = 5, num2 = 15, sum;
      sum = num1 + num2;

      System.out.println("Sum of these numbers: "+sum);
   }
}
Output:
Sum of these numbers: 20

Sum of two numbers with User input

The Scanner is class that allows us to capture the user input so that we can get the values of both the numbers from user. The program then calculates the sum and displays it.

import java.util.Scanner;
public class AddTwoNumbers2 {

    public static void main(String[] args) {
        
        int num1, num2, sum;
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter First Number: ");
        num1 = sc.nextInt();
        
        System.out.println("Enter Second Number: ");
        num2 = sc.nextInt();
        
        sc.close();
        sum = num1 + num2;
        System.out.println("Sum of these numbers: "+sum);
    }
}

Output:
Enter First Number: 
121
Enter Second Number: 
19
Sum of these numbers: 140

Using Python

Using javascript