Home / C / c program to swap two numbers without using a third variable

c program to swap two numbers without using a third variable

Swap two numbers without using a third variable | Swap Two numbers without using a temporary variable: There are 4 tricks to swap two numbers without using a third variable. You can use of them for your program. However the trick #4 is the smartest, fastest & easiest of all. The trick used is nothing but basic mathematics fundamentals like: multiplication, division and addition , subtraction. Further explanation is given below:

 Trick #1

 
  Trick #1: Addition, subtraction

A=A+B;
B=A-B;
A=A-B

Program #1: Swap two numbers without using third variable using addition and subtraction.

#include <stdio.h>
int main()
{
    int a,b;
    printf("Enter two numbers to swap (a & b) : ");
    scanf("%d",&a);
    scanf("%d",&b);
    printf( "Values before swapping:\nValue of a =%d \nValue of b=%d",a,b);
    a=a+b;
    b=a-b;
    a=a-b;
    printf( "\nValues after swapping:\nValue of a =%d \nValue of b=%d",a,b);
}

 Trick #2

 

 Trick #3

 
 Trick #3: XOR Operation,

A=A^B;
B=A^B;
A=A^B;

Program #3: Swap two numbers without using third variable : XOR operation trick.

#include<stdio.h>
int main()
{
    int a,b;
    printf("Enter two numbers to swap (a & b) : ");
    scanf("%d",&a);
    scanf("%d",&b);
    printf( "Values before swapping:\nValue of a =%d \nValue of b=%d",a,b);
    a=a^b;
    b=a^b;
    a=a^b;
    printf( "\nValues after swapping:\nValue of a =%d \nValue of b=%d",a,b);

}

 Trick #4

 

 

Check Also

How to Solve Linear Equation in One Variable In C Programming?

C Program to Solve any Linear Equation in One Variable Find complete C program to ...

Leave a Reply

Your email address will not be published. Required fields are marked *