what os the different between global variable and local variable

Answer 1

local variables are inaccessible out of the scope. Global variables are common in anywhere of the program

Answer 2

In Java it looks like this if you can relate.

Global Variable

int x = 0;

for(;x<1;++x){x is Global}

___________________________

Local Variable

for(int x= 1; x<1;++x){x is Local}

Answer 3

Globals you can use in anywhere in your code

Locals only where you defined its, for example into a function

Answer 4

If you define a local variable in a function sum() for example then you cant use values of that in a function div()

Answer 5

When you define a variable it is local by default. If you want call it inside a function, you must define as global.

For example:

#I'll ask the user a number
num = int (input ())

#Now I will do something with this number

def do_something ():
result = num + int (1)

do_something ()

print (do_something)

>>> Erro.

Why ????

Because num is local defined (default). To use it inside a function, you must define as global, it is, visible for everyone.

#I'll ask the user a number again
num = int (input ())

#Now I will do something with this number, but I'll define num as global

def do_something ():
global num
result = num + int (1)

do_something ()

print (do_something)

>>> 2 (if input was 1)

# ~~~~~~~~~~~~~~~~~~~ #

My English isn't good, but I've tried explain with my best. To read more about, check this out:

https://www.python-course.eu/python3_global_vs_local_variables.php