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Basic
Switch Case
Goto
Operators
if Statement
Nested if
While Loop
For Loop
Patterns
Array
2D Array
String Function Example
Pointers
Recursion Function
Structure
Excersises
Others



Swapping Two Numbers Without 3rd Variable Using C Program


Swapping means exchanging the values of two Variables.The following example shows how to Swap two numbers without third variable using C Program.

Example : pgm.c

#include<stdio.h>
int main(){
    int a,b,c;
    printf("\nEnter the value of A and B : ");
    scanf("%d%d",&a,&b);
    printf("\nBefore Swapping : ");
    printf("\nA value is %d",a);
    printf("\nB value is %d",b);
    a=a+b;
    b=a-b;
    a=a-b;
    printf("\nAfter Swapping : ");
    printf("\nA value is %d",a);
    printf("\nB value is %d",b);
    return 0;
}

Output:

Enter the value of A and B :
 10
 20

Before Swapping :
 A value is 10
 B value is 20

After Swapping :
 A value is 20
 B value is 10