Java Program to Add Two Numbers

// Java Program to implement
// Direct Addition to Add two Numbers
import java.io.*;

// Driver Class
class GFG {
    public static int sum(int num1, int num2)
    {
        return num1+num2;
    }
    
      // main function
    public static void main(String[] args)
    {
        GFG ob = new GFG();
        int res = ob.sum(28, 49);
        System.out.println(res);
    }
}

// Java Program to implement
// Bit Manipulation to Find 
// the Sum of two Numbers
import java.io.*;

// Driver Class
class GFG {
      // function to find sum
    public static int sum(int num1, int num2)
    {
        if (num2 == 0) return num1;
        return sum(num1 ^ num2, (num1 & num2) << 1);
    }
    
      // main function
    public static void main(String[] args)
    {
        GFG ob = new GFG();
        int res = ob.sum(28, 49);
        System.out.println(res);
    }
}

// Java Program to Sum of Three Numbers
import java.io.*;

class GFG {
    public static void main (String[] args) {
          // Three Integers
        int a=1,b=2,c=3;
           
          // Method 1:
      
          // Adding sum of a+b and then
          // sum of a+b with c
          int k=a+b;
          int result=k+c;
      
          // Printing to Sum
          System.out.println("Method 1: Sum a+b+c = "+result);
          
          // Method 2:
      
          // Printing the Sum of Three
          // Variables(Numbers)
          System.out.println("Method 2: Sum a+b+c = "+(a+b+c));    
    }
}

// Java Program to Add N Numbers
import java.io.*;
import java.util.*;

// Driver Class
class GFG {
    // main function
    public static void main(String[] args)
    {

        // N is the number if elements
        int N;

        // Initialising the Scanner Class
        Scanner sc = new Scanner(System.in);
      
          System.out.println("Enter the Number of elements:"

        // Taking the input of N
        N = sc.nextInt();
        int sum = 0;

        // Taking N inputs and find the sum
        for (int i = 0; i < N; i++) {
            int a = sc.nextInt();

            sum += a;
        }

        // Printing the sum of N numbers
        System.out.println("Sum of Input Numbers : " + sum);
    }
}

// Java Program to find 
// Sum of Two Numbers Using
// Command Line
import java.io.*;

// Driver Class
class GFG {
      // main function
    public static void main (String[] args) {
      
          // Command Line Input 
          // Stored in Variables
          int a= Integer.parseInt(args[0]);
        int b= Integer.parseInt(args[1]);
        
          // Printing Sum of variables
        System.out.println("Sum:"+(a+b));
    }
}

// Java program to demonstrate
// add() method of BigInteger
import java.math.BigInteger;

// Driver Class
public class GFG {
      // main function
    public static void main(String[] args)
    {
        // BigInteger object to store result
        BigInteger sum;

        // For user input
        // Use Scanner or BufferedReader

        // Two objects of String created
        // Holds the values to calculate the sum
        String input1 = "9482423949832423492342323546";
        String input2 = "6484464684864864864864876543";

        // Convert the string input to BigInteger
        BigInteger a = new BigInteger(input1);
        BigInteger b = new BigInteger(input2);

        // Using add() method
        sum = a.add(b);

        // Display the result in BigInteger
        System.out.println("Sum of Two BigIntegers: "
                           + sum);
    }
}