Program to swap two numbers without using the third variable

Java Program

import java.util.*;  
class Swap   
{  
    public static void main(String a[])   
    {   
        System.out.println("Enter the value of x and y");  
        Scanner sc = new Scanner(System.in);  
        /*Define variables*/  
        int x = sc.nextInt();  
        int y = sc.nextInt();  
        System.out.println("before swapping numbers: "+x +" "+ y);  
       /*Swapping*/  
        x = x + y;   
        y = x - y;   
        x = x - y;   
        System.out.println("After swapping: "+x +"  " + y);   
    }   
}  

Output:

Enter the value of x and y
23  43
before swapping numbers: 23  43
After swapping:  43  23

C Program

#include<stdio.h>  
int main()   
{   
  int x, y;  
  printf("Enter the value of x and y?");  
  scanf("%d %d",&x,&y);  
  printf("before swapping numbers: %d   %d\n",x,y);  
  
/*swapping*/  
  x = x + y;   
  y = x - y;    
  x = x - y;  
  printf("After swapping: %d    %d",x,y);   
  return 0;   
}  

Output:

Enter the value of x and y?
13 
22
before swapping numbers:  13  22
After swapping:  22  13

C# Program

using System;     
class swap {   
public static void Main()   
    {   
        Console.WriteLine("Enter the value of x and y");  
        int x=Convert.ToInt32(Console.ReadLine());  
        int y = Convert.ToInt32(Console.ReadLine());  
        Console.WriteLine("before swapping numbers: "+x +"  "+ y);  
          /*swapping*/  
        x = x + y;   
        y = x - y;   
        x = x - y;   
        Console.WriteLine("After swapping: "+x +"   " + y);   
          
    }   
}   

Output:

Enter the value of x and y
213 
432
before swapping numbers: 213   432
After swapping:  432   213

Python Program

x = int(input("Enter the value of x?"))  
y = int(input("Enter the value of y?"))  
print("before swapping numbers: %d   %d\n" %(x,y))  
#swapping#  
x = x + y     
y = x - y    
x = x - y     
print("After swapping: %d   %d\n"%(x,y))  

Output:

Enter the value of x? 
12
Enter the value of y? 
24
before swapping numbers:  12   24
After swapping:  24   12

PHP Program

<?php  
echo "Enter the value of x";  
$x = readline();  
echo "Enter the value of y";  
$y = readline();  
echo "before swapping numbers: ";  
echo $x;  
echo "    ";  
echo $y;  
echo "\n";  
  
/*swapping*/  
$x = $x + $y;   
$y = $x - $y;   
$x = $x - $y;   
echo "After swapping ";  
echo $x;  
echo "    ";  
echo $y;  
?> 

Output:

Enter the value of x   55
Enter the value of y   46
before swapping numbers:  55  46
After swapping  46  55