How to swap two variables without using temp variable?

Answer 1

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

You can check it with two values.

Answer 2

You can also use the XOR swapping algorithm.

X := X XOR Y
Y := Y XOR X
X := X XOR Y

Answer 3

https://code.sololearn.com/cx2Zl437LAcu/?ref=app

Answer 4

https://code.sololearn.com/cRlRP41C5vzn/?ref=app

Answer 5

a,b = b,a
This can swap two variables

Answer 6

I know that it works in javascript

Answer 7

@antonie it works for ruby too