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.

In a tiny program, this is probably not a problem, but as program length and complexity grow, bugs can thrive. For a start, ...

Creating Variables and Using the JavaScript Alert() Function. ... Although we're starting off our first programming lesson at 9:00 AM PST, ...

Instead, functional programming prefers to take an existing variable and pass it through a “pipeline” (a function or functions) that transforms it into a new variable, leaving the original as-is.