About the (not) function

Question

is adding not before a string or a line of code prints it in opposite ways

example
print ( not 9==9)

the out put came out as
false

so is it correct or there is something that I didn't understand just yet

Answer 1

"not" have many uses in Python

your example uses it as a Logical NOT which inverses the result

so 9==9 returns true --> NOT(true) --> false

https://www.tutorialspoint.com/python/logical_operators_example.htm

some basic operations in general (you can find more uses of not as well)

https://www.tutorialspoint.com/python/python_basic_operators.htm

Answer 2

Yes...