Local & Global Variables (Cambridge (CIE) IGCSE Computer Science)

A local variable is a variable declared within a specific scope, such as a function or a code block

Local variables are accessible only within the block in which they are defined, and their lifetime is limited to that particular block

Once the execution of the block ends, the local variable is destroyed, and its memory is released

In this python code, you can see that the localVariable (with the value 10) is declared inside of the function printValue

This means that only this function can access and change the value in the local variable

It cannot be accessed by other modules in the program

A global variable is a variable declared at the outermost level of a program.

They are declared outside any modules such as functions or procedures

Global variables have a global scope, which means they can be accessed and modified from any part of the program

In this python code, you can see that the globalVariable (with the value 10) is declared outside of the function printValue

This means that this function and any other modules can access and change the value in the global variable