swap 2 integers without using temporary variable

using System;

class MainClass {
  public static void Main (string[] args) {
    int num1 = int.Parse(Console.ReadLine());
    int num2 = int.Parse(Console.ReadLine());
      num1 = num1 + num2; 
      num2 = num1 - num2; 
      num1 = num1 - num2; 
      Console.WriteLine("After swapping: num1 = "+ num1 + ", num2 = " + num2); 
    Console.ReadLine();
  }
}

// Java Program to swap two numbers  without 
// using temporary variable 
import java.*; 
  
class Geeks { 
  
    public static void main(String a[]) 
    { 
        int x = 10; 
        int y = 5; 
        x = x + y; 
        y = x - y; 
        x = x - y; 
        System.out.println("After swaping:"
                           + " x = " + x + ", y = " + y); 
    } 
} 
  
// This code is contributed by Sam007 

// Java Program to swap two numbers 
// without using temporary variable 
import java.io.*; 
  
class GFG { 
    public static void main(String[] args) 
    { 
        int x = 10; 
        int y = 5; 
  
        // Code to swap 'x' and 'y' 
        x = x * y; // x now becomes 50 
        y = x / y; // y becomes 10 
        x = x / y; // x becomes 5 
  
        System.out.println("After swaping:"
                           + " x = " + x + ", y = " + y); 
    } 
} 
  
// This code is contributed by ajit 

// C++ Program to swap two numbers 
// without using temporary variable 
#include <bits/stdc++.h> 
using namespace std; 
  
int main() 
{//NOTE - for this code to work in a generalised sense, y !- 0 to prevent zero division  
    int x = 10, y = 5; 
  
    // Code to swap 'x' and 'y'  
    x = x * y; // x now becomes 15 
    y = x / y; // y becomes 10 
    x = x / y; // x becomes 5 
    cout << "After Swapping: x =" << x << ", y=" << y; 
} 
  
// This code is contributed by mohit kumar.