How to swap two numbers without using temp variables or arithmetic operations?

Question

This equation swaps two numbers without a temporary variable, but uses arithmetic operations:

a = (a+b) - (b=a);

How can I do it without ar

Answer 1

In addition to the above solutions for a case where if one of the value is out of range for a signed integer, the two variables values can be swapped in this way

a = a+b;
b=b-(-a);
a=b-a;
b=-(b);