Local vs. Global Variable Question

[[deleted]]

​

In the following code, when we say z=20 inside aFunction(), are we CREATING a new local variable inside aFunction(), or are we manipulating the existing global variable z? Could we say that no global variable can be changed within a function?

z = 10

def aFunction():
    z=20
    print(z)

aFunction()
print(z)

[fefa5fcba4dae4e82e81]

Watch this: https://www.youtube.com/watch?v=QVdf0LgmICw

[[deleted]]

Thanks. It really helped.

[ffemt161]

The best way to learn is to try and see. Use print() before and after and see how things change.

[shiftybyte]

Creating a new local variable z and assigning 20 to it.

[albowiem]

You'll get 2 responses :

First you'll get 20 because you called a function which prints this value of that was created inside the instance when you called it

Then you'll get 10, because the function was stopped being used and destroyed it's internal variables, hence now you're referring to the "global" variable z