C Program To Swap Two Variables

C Program To Swap Two Variables without using the third variable. This type of C programs are asked in various Interviews.There are various methods to achieve this one. For example, a=a+b;
b=a-b;
a=a-b;
Here we use the XOR(^) operator to Swap Two Variables without using the third variable. Read more about C Programming Language .

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#include<stdio.h>

int main()
{
int a=20;
int b=10;
printf("Values of a and b before swappingn");
printf("a=%dnb=%dn",a,b);
a=a^b;
b=b^a;
a=b^a;
printf("Values of a and b After swappingn");
printf("a=%dnb=%dn",a,b);
return 0;
}
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