Variable Scope

Variable Scope

The scope of a variable is where you can access it.

One way to think about the scope of a variable is where it lives and who can see it in a program.

Global Variable

A global variable is defined outside of functions and is visible to all functions that are defined after it.

scope.py

x = 10

def main():
   print(x)
   
main()

What is the output of this program?

Local Variable

A local variable is defined within a function. Another way to think about it is, a variable that is declared inside a function, stays inside the function.

def main():
    x = 10
    print(x)
main()

What is the output of this program?

Local vs Global Variable

x = 10

def main():
    x = 11
    print(x)
    
main()

What is the output of this program?