JavaScript also supports global variables, which have scope throughout the program. Here’s an alternative version of the factorial function that requires you to set a global variable before you ...

Scope in JavaScript refers to context (or portion) of the code which determines the accessibility (visibility) of variables. In JavaScript, we have two types of scope, local , and global.

JavaScript variables hold a wide variety of information and can be used with virtually any data type. Here's how to use variables to store numbers, text strings, objects, and more.