adding two numbers in java code example

Example 1: java sum of two numbers program intellij

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);
   }
}

Example 2: java sum of two numbers program intellij

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:

Example 3: java program to add two numbers using method

// addition program in java
import java.util.Scanner;
public class AddTwoNumbers
{
   public static void main(String[] args)
   {
      int num1, num2, sum;
      Scanner sc = new Scanner(System.in);
      System.out.println("First number : ");
      num1 = sc.nextInt();
      System.out.println("Second number : ");
      num2 = sc.nextInt();
      sum = addTwo(num1, num2);
      System.out.println("Sum : " + sum);
      sc.close();
   }
   public static int addTwo(int a, int b)
   {
      int sum = a + b;
      return sum;
   }
}