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.

Variables and arrays are used to store data to use within your code. A variable can store one piece of data whle an array can store multiple values. Inside a document.write() command, text in between ...

Computer variables differ from mathematical variables in that they can store different values at different times. We tell JavaScript to create or declare a variable by putting the keyword var in front ...

Nowadays JavaScript has three different keywords to declare a variable — var, let and, const. Each has its own properties and particularities. Let’s start by making a simple comparison table ...

Variables are made to receive values directly or through evaluated expressions compounding values and operators or results of function calls: the value is stored internally and the variable references ...