Simple java program for adding two numbers

Java Program to Add Two Integers

In this section, you will learn how to easily add two numbers in Java. Let's see :

• If you using int data type, then you can add numbers up to alimit(range of int data type).

• If you want to add very large numbers, then you may use theBigInteger class in Java.

1.) First program :

In this program, we specify the value of both the numbers in the program itself.

Let's try to create a simple example :

  ➤ Example : Add two numbers with predefined value;

class AddTwoNumbers {
      public static void main(String[] args) {      
        int x = 10, y = 15, sum;
        sum = x + y;
      
        System.out.println("Sum of these numbers: "+sum);  
     }
}

Explanation :

 Example 1 : explanation

In the above program, we have created three integer variables x, y and sum, then stored (10 and 15) values in x and y.

• Then, x and y are added using the + operator, and its result is stored in another variable sum.

• Finally, sum is printed on the screen using System.out.println() function.

2.) Second program :

In this program, we will take two inputs from the user(entered by the user) and prints the sum.

Note : Scanner class is a part of package(java.util package), so we required to import this package in our Java program.

Let's try to create a simple example :

  ➤ Example : Add two numbers with user input(Scanner);

import java.util.Scanner;
class AddTwoNumbers 
{
   public static void main(String[] args) {      
      int x, y, add;

      System.out.println("Enter two integers to calculate their sum : ");
      Scanner in = new Scanner(System.in);
     
      x = in.nextInt();
      y = in.nextInt();
      sum = x + y;
     
      System.out.println("Sum of two numbers is = " + sum);
   }
}

Explanation :

 Example 2 : explanation

In the above program, we have created three integer variables x, y and sum, then create a Scanner class so that you can take input from the user for x and y.

• Then, x and y are added using the + operator, and its result is stored in another variable sum.

• Finally, sum is printed on the screen using System.out.println() function.