Q:

Program to swap two numbers without using the third variable

belongs to collection: Number Programs

robaa
Save to bookmark
|
2022-11-08
|
  207 
0

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
Php programming, Python programming, Java programming, C programming, c# programming, examples, Php programming examples, Python programming examples, Java programming examples, C programming examples, c# programming examples,
login and add your own answer to this question

All Answers

robaa
2022-11-08
need an explanation for this answer? contact us directly to get an explanation for this answer

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

need an explanation for this answer? contact us directly to get an explanation for this answer

total answers (1)

Number Programs
This question belongs to these collections

Similar questions

need a help?

find thousands of online teachers now
<< Program to swap two numbers...