function xor in app inventor

[Руслан Краснощёков]

How can i xor two numbers in app inventor?
I did in this way : x xor y = x•not y + not x•y.
But i cant add numbers to logic block.

[Abraham Getzler]

Apparently, AI2 enforces type constraints for logical

blocks and math blocks.

You can't code 1 AND 1

but you can code True AND True.

This doesn't preclude you from writing conversion routines

to convert your numbers into text strings of 1's and 0's,

and writing your own string versions of AND, OR, NOT, XOR, etc.

Or you could convert numbers to lists of booleans, 

then knit two lists together into a third list bool by bool using the logic blocks.

What fun!

ABG

[Руслан Краснощёков]

please tell me, how can I do xor two Math numbers?

[Abraham Getzler]

See attached.

ABG

[Scott Ferguson]

Nicely done, and recursive!

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sf

[Руслан Краснощёков]

Large thanks Abraham Getzler! You helped me Very !!!!