The type attribute, whose value is "text," tells browsers to create a text box instead of another type of control such as a button. The id attribute, which is optional, can come in handy if you ...

As with almost every programming language, JavaScript treats various types of values differently. A string like “Hello world” is very different from a number like 42.

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.