Boolean operator is used as output and input why

Answer 1

I don't know iam just asking that why the output is always 0,1

Answer 2

Ooooh to save space in memory. It is much more efficient to store a true / false variable as a binary representation (1 or 0 respectively) than as a string.

Answer 3

Can you provide some more context to your question. Is there an example code you could provide?