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.

The "+=" operator tells JavaScript to add the variable on the right side of the operator to the variable on the left. Floating-Point Addition Floating-point numbers, such as 1.234, contain decimal ...

TypeScript 2.0 introduces a big step forward here by giving developers greater control over null values. null, used to denote (in some broad, hand-waving sense) that a variable holds no value at ...