Java Program to Add the two Numbers

In this article, we will understand how to add two numbers in Java. This can be done using the '+' operator.

Below is a demonstration of the same −

Input

Suppose our input is −

input_1 : 10
input_2 : 15

Output

The desired output would be −

Sum : 25

Algorithm

Step1- Start
Step 2- Declare three integers: input_1, input_2 and sum
Step 3- Prompt the user to enter two integer value/ define the integers
Step 4- Read the values
Step 5- Add the two values using an addition operator (+)
Step 6- Display the result
Step 7- Stop

Example 1

Here, the input is being entered by the user based on a prompt. You can try this example live in ourcoding ground tool .

import java.util.Scanner;
public class NumberAddition{
   public static void main(String[] args){
      int input_1, input_2, my_sum;
      Scanner my_scanner = new Scanner(System.in);
      System.out.println("A reader object has been defined ");
      System.out.println("Enter the first number: ");
      input_1 = my_scanner.nextInt();
      System.out.println("Enter the second number: ");
      input_2 = my_scanner.nextInt();
      my_scanner.close();
      System.out.println("The scanner object has been closed");
      my_sum = input_1 + input_2;
      System.out.println("Sum of the two numbers is: ");
      System.out.println(my_sum);
   }
}

Output

A reader object has been defined
Enter the first number:
23
Enter the second number:
45
The scanner object has been closed
Sum of the two numbers is:
68

Example 2

Here, the integer has been previously defined, and its value is accessed and displayed on the console.

public class NumberAddition{
   public static void main(String[] args){
      int value_1, value_2, my_sum;
      value_1 = 10;
      value_2 = 15;
      System.out.printf("The two numbers are %d and %d",value_1, value_2 );
      System.out.printf("\n");
      my_sum = value_1 + value_2;
      System.out.println("The numbers have been added using '+' operator");
      System.out.println("\nSum of the two numbers is : ");
      System.out.println(my_sum);
   }
}

Output

The two numbers are 10 and 15
The numbers have been added using '+' operator

Sum of the two numbers is :
25