Sometimes, we need to store a piece of information so that we can refer to it — often multiple times — later on. In real life, we would probably jot down a note in a notebook or on a post-it. In ...

What is a variable in JavaScript? A variable in JavaScript is a container used to store data values that your program can use and manipulate. What are the variable naming conventions in JavaScript?

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.