Defining Global Variables
Global variables are declared without being nested inside any function or block. They are typically declared at the top level of your script.
Accessing Global Variables
Global variables can be accessed and used from anywhere in your code, including within functions.
Modifying Global Variables
Global variables can also be modified from any part of your code.
Potential Issues with Global Variables
Using global variables excessively can lead to unintended consequences and make your code harder to maintain. For example, if multiple parts of your code modify a global variable simultaneously, it might lead to unexpected behavior or bugs. This is why it's generally recommended to use global variables sparingly and consider encapsulating data within functions or objects to control their scope and access.
Global variables are variables declared outside any function or block, accessible and modifiable throughout your entire program. However, it's a good practice to limit their usage to maintain code clarity and prevent unintended side effects.