python change global variable from function
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title: changing global variables in python functions - a step-by-step tutorial
introduction:
in python, global variables are variables declared outside of any function or block of code. while it is generally recommended to avoid using global variables, there are scenarios where you may need to modify them within a function. this tutorial will guide you through the process of changing global variables from within a python function.
step 1: declare a global variable
step 2: create a function to modify the global variable
step 3: call the function
explanation:
declare a global variable:
in this step, we declare a global variable outside any function or block of code. this variable will be modified within a function.
create a function to modify the global variable:
in this step, we define a function called modify_global_variable(). inside the function, we use the global keyword to indicate that we are working with the global variable, and then we modify its value.
call the function:
after defining the function, we call it using modify_global_variable(). this will execute the code inside the function, modifying the global variable. we then print the value of the global variable both inside and outside the function to demonstrate the change.
output:
the output of the code will show the original and modified values of the global variable:
conclusion:
while using global variables should be done cautiously, there are situations where modifying them within a function is necessary. by following these steps and using the global keyword, you can successfully change the value of a global variable from within a python function.
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