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Another way to swap two numbers without using temporary variable in C Language?

Introduction: In this article i am going to explain with example program How to swap/interchange the value of two numbers without using third variable in C language.

Description: Swapping the value of two numbers in C Language is off course not a difficult task. But how many of us actually know that there are multiple ways to swap the value of two variables in C language. There are a number of ways to swap the value of two numbers in C Language.  In this article I am going to use Multiplication (*) and Division (/) arithmetic operators to help in swapping. In previous article How to swap two numbers in C Language ?  I explained how to swap two numbers using temporary variable and there is also my another article How to swap two numbers without using temporary variable in C Language?  that explains another way to swap two numbers in C Language .

Implementation: let's understand by creating a program to swap the values of two numbers.

#include<stdio.h>
#include<conio.h>
void main()
{
 int a,b;
  clrscr();
 printf("Enter the value of a= ");
 scanf("%d",&a);
 printf("\nEnter the value of b= ");
 scanf("%d",&b);

 printf("\nValue of a before swapping= %d",a);
 printf("\nValue of b before swapping= %d",b);
 a=a*b;
 b=a/b;
 a=a/b;
 printf("\nValue of a after swapping= %d",a);
 printf("\nValue of b after swapping= %d",b);
 getch();
 }

Run the program using ctrl+F9

Output:
Enter the value of a=10
Enter the value of b=20

Value of a before swapping=10
Value of b before swapping=20
Value of a after swapping=20
Value of b after swapping=10

Now over to you:
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April 05, 2013 × This comment has been removed by a blog administrator.
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