Python Global Variables

Learn about global variables in Python, which are defined outside of functions and can be accessed globally. Discover how to use and manipulate these variables within functions and across your Python code.

Python - Global Variables

Global variables are variables that are created outside of a function. These variables can be accessed both inside and outside of functions.

Using Global Variables Inside Functions

Here's an example of creating a variable outside a function and using it inside the function:

x = "awesome"

def myfunc():
    print("Coding is " + x)

myfunc()

Coding is awesome

Local vs Global Variables with the Same Name

If you create a variable with the same name inside a function, it will be local to that function. The global variable with the same name will remain unchanged.

x = "awesome"

def myfunc():
    x = "fantastic"
    print("Coding is " + x)

myfunc()

print("Coding is " + x)

Coding is fantastic
Coding is awesome

The global Keyword

Normally, when you create a variable inside a function, it is local to that function. To create a global variable inside a function, use the global keyword.

def myfunc():
    global x
    x = "fantastic"

myfunc()

print("Coding is " + x)

Coding is fantastic

You can also use the global keyword to modify a global variable inside a function.

x = "awesome"

def myfunc():
    global x
    x = "fantastic"

myfunc()

print("Coding is " + x)

Coding is fantastic