As far as i know these are bitwize operators?

&& is the logical AND. You use it to combine two bits / booleans, for instance like this:

if (x > 0 && x < 11)

If x is -2, the above will turn into

if (false && true), then

if (false), which will cause the subsequent commands to not happen.

& in contrast is meant to combine the individual bits, usually of integers.

For instance 10 & 7 will evaluate to 2, since 10 in binary is 1010 and 7 in binary is 0111. The only common bit is the third from the right, 0010, which is 2 in decimal.

You can actually use

if (x > 0 & x < 11) instead,

but if you use 10 && 7 instead of 10 & 7, the compiler will either complain or turn any number other than zero into "true", which means 10 && 7 is simply "true" instead of 2.

AND

OR

XOR