swapping variables

Python:

Code:

def xorswap(a, b):
  if(a != b):
    a ^= b
    b ^= a
    a ^= b
  return (a, b)

Python (cheating method):

Code:

def swap(a, b):
  a, b = b, a
  return (a, b)

C:

Code:

void xorswap(int *x, int *y)
{
  if(x != y)
  {
     *x ^= *y
     *y ^= *x
     *x ^= *y
  }
}

Pascal:

Code:

procedure xorswap(var X, Y: integer);
begin
  if X <> Y then begin
    X := X xor Y;
    Y := X xor Y;
    X := X xor Y;
  end
end