Program to swap two numbers without using the third variable

by Online Tutorials Library July 22, 2022

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   %dn”,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   %dn” %(x,y))  #swapping#  x = x + y     y = x – y    x = x – y     print(“After swapping: %d   %dn”%(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#

Program to swap two numbers without using the third variable

Program to swap two numbers without using the third variable

Algorithm

Java Program

C Program

C# Program

Python Program

PHP Program

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