Swap two number variables without using a temp third

[MachineCode]

Today I read how to swap two number variables without using a temp third. This is much slower than using PureBasic's "Swap" command, and doesn't take data type limits into account, which is why I didn't post it as a "tip"; but I think it's cool anyway. I never knew it could be done by maths like this. Does anyone know any other ways?

Code: Select all

a=12345
b=67890
a+b : b=a-b : a-b
Debug a
Debug b

[idle]

Can't say that it occurred to me to swap that way with add and subtract
you can do the same with or and xor

Code: Select all

a=12345
b=67890
a|b : b!a : a!b
Debug a
Debug b

[graph100]

remain the problem of the high number
if the sum is higher than the type allow.

[eesau]

Code: Select all

A = 1
B = 2

; Let's swap them without using a temp third variable

B = 1
A = 2