Global variables

Definition

Global variables are variables that are declared outside of any function and can be accessed from anywhere within the program. They have a global scope, meaning they can be used by any part of the code.

Related terms

Local variables:

Local variables are declared inside a specific function and can only be accessed within that function. They have a local scope, meaning they are limited to their own little "bubble".

Parameter:

A parameter is a special type of variable used in functions to receive values when the function is called. It acts as a placeholder for the actual values that will be passed into the function.

Scope:

Scope refers to the visibility or accessibility of variables within different parts of a program. The scope determines where and for how long a variable exists and can be referenced.