Answer / srinivas

int a=2,b=3;
a=a+b-(b=a); /*now a=3, b=2*/

Answer / chitra

main()
{
int a,b;

a=a+b;
b=a-b;
a=a-b;
}

chitra write answer

Answer / kumar

//language using C#

int a=10;
int b=20;

a=a+b;
b=a-b;
a=a-b;

thanks
Kumar
http://www.sourcecodehub.com/php/how-to-swap-values-of-two-variables-without-using-a-third-variable-integer/

Answer / joel pinto

a^=b^=a^=b;

Answer / nisay mizrahi

double a,b;
System.out.println("put in 2 numbers");
a=in.nextDouble();
b=in.nextDouble();
if(a>b){
a=a-b;
b=b+a;
a=b-a;

}
else
if(b>a){
b=b-a;
a=a+b;
b=a-b;
}
System.out.println("a is "+a);
System.out.println("b is "+b);
}

}

Answer / neha

class SwapBitwise
{
public void SwapByBitwise(int x, int y)
{
x =x ^ y;
y = x ^ y;
x = x ^ y;
System.out.println("x : " + x + " " + "y :" + y);
}
}
public class SwapOperation
{
public static void main(String[] args) {
SwapBitwise obj = new SwapBitwise();
obj.SwapByBitwise(200, 300);
}

}

Answer / adil

string a = "adil ahmad", b = "anuj gupta";
a = a + b;
b = a.Substring(0, a.Length - b.Length);
a = a.Substring(b.Length, a.Length - b.Length)

Answer / padma

Need more information related to,
1. the values and type of variables before doing a swap, in
order to do the efficient memory management and code
robustness.
2.the reason to swap without using third variable.

3.code efficiency increased due to the two variable alone.

4.pre and post conditions for swap

5.the programming laguage to be used to do swap.

Answer / guest

using swap instruction in micro controller.

Answer / guest

using swap instruction in micro controller.

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