5 Ways to Add Two Numbers in Java with User Input (Examples)

5 Ways to Add Two Numbers in Java with User Input (Examples)

In this article, we will discuss the concept of Java Code: 5 Ways to Add Two Numbers (With Examples)

In this post, we are going to learn how to write a program to 5 Ways to Add Two Numbers (With Examples) in  Java programming language.

here, I’ll give you separate short programs for each method so it’s easier to understand

Add Two Numbers (With Examples)

Using ‘+’ operator with user input

In this post, we will use simple arithmetic operator to find sum of two numbers

Program 1

//Addition two numbers using user input
//using simple addition operator in Java Programming 
import java.util.Scanner;
public class Simple_Addition{

    public static void main(String[] args) {
      Scanner input=new Scanner(System.in);
 System.out.println("Enter value for num1:");
int num1=input.nextInt();

 System.out.println("Enter value for num2:");
int num2=input.nextInt();
    int result=num1+num2;
        System.out.println(" result :"+result);
    }
}

When the above code is executed, it produces the following result

Enter value for num1:
25
Enter value for num2:
45
result :70

 

Using a method with user input

In this post, we will use a custom method with user input to find sum of two numbers

Program 2

//addition of two numbers using a method
//in java programming using user input
import java.util.Scanner;
class AddTwoNum{
    public static void main(String[] args) {
      Scanner input=new Scanner(System.in);
 System.out.println("Input value for num1:");
int num1=input.nextInt();
//reading the first value
 System.out.println("Input value for num2:");
int num2=input.nextInt();
//reading the second value
        int sum=addNum(num1,num2);
        //calling the method for output
        System.out.println("Sum: "+sum);
    }
    public static int addNum(int a, int b){
     return a+b;  
     //user defined method
    }
}

When the above code is executed, it produces the following result

Input value for num1:
46
Input value for num2:
44
Sum: 90

 

Using a recursive method with user input

In this post, we will use a recursive method with user input to find sum of two numbers

Program 3

//addion java two num Using recursion
import java.util.Scanner;
class AddTwoNumUsingRecursion {
    //recursive function add two numbers
    public static int addTwoNum(int a,int b){
        if(b==0){
            return a;//Base case:If b become zero, result is a
    }
    return addTwoNum(a+1, b-1);//increment a, dicrement b
    }
    public static void main(String[] args) {
        Scanner input=new Scanner (System.in);
        System.out.println("Enter first number: ");
        int num1=input.nextInt();
         System.out.println("Enter second number: ");
        int num2=input.nextInt();
        int sum=addTwoNum(num1,num2);
        System.out.println("Sum of " + num1 + " and "+ num2+" : "+ sum);
    }
}

When the above code is executed, it produces the following result

Enter first number:
45
Enter second number:
55
Sum of 45 and 55 : 100

 

Using a constructor with user input

In this post, we will use a constructor with user input to find sum of two numbers

Program 4

//Addition two numbers using constructor
//in Java Programming 
import java.util.Scanner;
public class Cons_Add{
    private int result;
    //global variable
    public Cons_Add(int a, int b){
        this.result=a+b;
    }//using this keyword
    
    public int get_Result(){//user defined method
        return result;
    }
    public static void main(String[] args) {
      Scanner input=new Scanner(System.in);
 System.out.println("Input value for num1:");
int num1=input.nextInt();

 System.out.println("Input value for num2:");
int num2=input.nextInt();
    
             System.out.println("Addition of two numbers using  constructor:");

        Cons_Add add=new Cons_Add(num1,num2);
        System.out.println(" result :"+add.get_Result());
    }
}

When the above code is executed, it produces the following result

Input value for num1:
56
Input value for num2:
67
Subtraction of two numbers using constructor:
result :123

 

Using a for Loop

Program 5

//add two numbers in java using loop (Increment method)
import java.util.Scanner;
class AddTwoNumUsingLoop {
    public static void main(String[] args) {
        Scanner input=new Scanner (System.in);
        System.out.println("Enter first number: ");
        int num1=input.nextInt();
         System.out.println("Enter second number: ");
        int num2=input.nextInt();
        int sum=num1;
        for(int i=0; i<num2; i++){
            sum++;
        }
        System.out.println("Sum = : "+sum);
    }
}

When the above code is executed, it produces the following result

Enter first number:
125
Enter second number:
225
Sum = : 350

 

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