Help to understand the code. What's the output of the code?

Question

lna_gain = tempint& ~0x07

what does this right side mean? what does the ~ do?
if for example tempint = 32, what is the output of the code?

Answer 1

A & ~B is like a filter for the bits of A. As an example, suppise A and B are chars, and A is defined to be 11011001, and B 00011111. Then ~B = 11100000, and if we AND them together we get

11011001
& 11100000
-------------------
11000000

This means that C = A & ~B is just A where if the same bit of B is set to 1, then the same bit on C is set to 0.

Answer 2

~ is a bitwise negation

https://code.sololearn.com/cYjh7XuMlzG7/?ref=app