What is the name of this '~' ? And what does it do?

Answer 1

Aymane Boukrouh
This question has a tag of c
which shows that this question is related to c language

Answer 2

https://www.sololearn.com/learn/4076/?ref=app

Answer 3

https://stackoverflow.com/questions/11572181/not-vs-negation
https://www.ibm.com/support/knowledgecenter/en/ssw_ibm_i_72/rzarg/bitnege.htm

Answer 4

If this were a C++ question, it could also be the starting symbol of destructor names.

Answer 5

It's called tilde, it's just a symbol,no specific uses.