Whats stands "!" In coding

Answer 1

! Stands for 'not' in most of the programing languages . Like:

if 1 != 2:
print('not equal')

>>>not equal

Answer 2

Thanks i understood :)

Answer 3

In many programming languages (except in Python) ! also stands for negation opetation, which turns a boolean value into the opposite one.

!true ---> false
!false ---> true