How do you swap two integer variables without using any if conditions, casting, or additional variables? [closed]

Answer 1

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

Answer 2

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

That's it!

Answer 3

If you think you are being clever by not using 3rd variable then do some performance tests and you see that the much faster way is to use 3rd int to store the variable temporarily.

Anyways, i solved the problem with XOR bitwise operator:

a ^= b;
b ^= a;
a ^= b;

Answer 4

simple try this

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

and that's it

Answer 5

yes you can do it By using plus/minus operation.

Example:
num1 = num1 + num2;                
num2 = num1 - num2;                
num1 = num1 - num2;

Answer 6

It's a little trick.

int a = 5;
int b= 10;
a = a+b;
b = a-b; /* Really (a+b) - b i.e. a */
a = a-b; /* Really (a+b) - a i.e. b */