Built-in JavaScript objects and functions are ones you'll use all the time. Here's how to use Object, JSON, String, Math, Date, and console in your JavaScript programs.

Arrays in JSON are surrounded by square brackets, like these [ ]. Each value in the array is separated by a comma. Users can access array values and update, delete or loop them. An array can be stored ...

JavaScript’s arrays can hold heterogeneous types, change size on the fly, and readily insert or remove elements. Traditional methods like slice, splice, and push/pop do this by operating on the ...