Program to swap two numbers without using the third variable

Program to swap two numbers without using the third variable on fibonacci, factorial, prime, armstrong, swap, reverse, search, sort, stack, queue, array, linkedlist, tree, graph, pattern, string etc.

<< Back to PROGRAM

next → ← prev

Program to swap two numbers without using the third variable

This program is to swap/exchange two numbers without using the third number in the way as given below:

Example: Suppose, there are two numbers 25 and 23.

Let

X= 25 (First number), Y= 23 (second number)
Swapping Logic:
X = X + Y = 25 +23 = 48
Y = X - Y = 48 - 23 = 25
X = X -Y = 48 - 25 = 23
and the numbers are swapped as X =23 and Y =25.

Algorithm

STEP 1: START
STEP 2: ENTER x, y
STEP 3: PRINT x, y
STEP 4: x = x + y
STEP 5: y= x - y
STEP 6: x =x - y
STEP 7: PRINT x, y
STEP 8: END

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

Next Topic#

← prev next →

.Net

.NET Array Dictionary List String 2D Async DataTable Dates DateTime Enum File For Foreach Format IEnumerable If IndexOf Lambda LINQ Parse Path Process Property Regex Replace Sort Split Static StringBuilder Substring Switch Tuple

Java

Core Array ArrayList HashMap String 2D Cast Character Console Deque Duplicates File For Format HashSet If IndexOf Lambda Math ParseInt Process Random Regex Replace Sort Split StringBuilder Substring Switch Vector While

TheDeveloperBlog.com

Program to swap two numbers without using the third variable