Marie

Hi I have a variables that is declared outsides fucntions. How can I use and change these variables inside function usign Python? thank you

Best Answer

Gwennavia

Added an answer on August 9, 2022 at 9:40 am

Follow this example to create a variable outside functions, and use it inside the functions: MyVariable = 99 #this is a global variable def changeAndPrint_GlobalVariable(): global MyVariable #use global variable in this function with "global" keyword print('Global variable "MyVariable" before changeRead more

Follow this example to create a variable outside functions, and use it inside the functions:

MyVariable = 99 #this is a global variable

def changeAndPrint_GlobalVariable():
    global MyVariable  #use global variable in this function with "global" keyword
    print('Global variable "MyVariable" before change = ', MyVariable) # the global variable is printed
    MyVariable = 1  #change the value of the global variable is printed
    print('Global variable "MyVariable" after change = ', MyVariable) # the global variable is printed

def changeAndPrint_LocalVariable():
    MyVariable = 77 #this is a local variable
    print('Local variable "MyVariable" = ', MyVariable) #the local variable is printed

changeAndPrint_GlobalVariable() #call the function
changeAndPrint_LocalVariable() #call the function

MyVariable = 99 #this is a global variable

def changeAndPrint_GlobalVariable():

global MyVariable #use global variable in this function with "global" keyword

print('Global variable "MyVariable" before change = ', MyVariable) # the global variable is printed

MyVariable = 1 #change the value of the global variable is printed

print('Global variable "MyVariable" after change = ', MyVariable) # the global variable is printed

def changeAndPrint_LocalVariable():

MyVariable = 77 #this is a local variable

print('Local variable "MyVariable" = ', MyVariable) #the local variable is printed

changeAndPrint_GlobalVariable() #call the function

changeAndPrint_LocalVariable() #call the function

This code will print:

Global variable "MyVariable" before change =  99
Global variable "MyVariable" after change =  1
Local variable "MyVariable" =  77

Global variable "MyVariable" before change = 99

Global variable "MyVariable" after change = 1

Local variable "MyVariable" = 77

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How do I use a global variable inside a function using Python?

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