JavaScript how to make a global variable

Learn to create global variables using Javascript.

Global Variables in JavaScript

A global variable in JavaScript is any variable that is declared outside of a function. Global variables are accessible from any part of the code, including functions and have the same value throughout the lifetime of the script.

Global variables can be declared using the var keyword followed by the name of the variable. For example:

var x = 10;

In the above example, x is a global variable. It can be accessed anywhere in the code, including inside functions.

Global variables can also be declared without using the var keyword. In this case, the variable is automatically added to the global scope. For example:

y = 20;

In the above example, y is a global variable. It can be accessed anywhere in the code, including inside functions.

It is important to note that global variables are generally considered bad practice as they can lead to unexpected behavior and errors in the code. Therefore, it is best to avoid using global variables where possible.