Please note, this is a STATIC archive of website developer.mozilla.org from 03 Nov 2016, cach3.com does not collect or store any user information, there is no "phishing" involved.

Type  (or data type) is a characteristic of a value affecting what kind of data it can store — for example in JavaScript a Boolean only holds true/false values, whereas a String holdstext strings, a Number holds numbers of any kind, etc.

A value's data type also affects which operations are valid on that value. For example, an integer can be multiplied by an integer, but not by a string.

Learn more

General knowledge

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, hbloomer, Andrew_Pfeiffer
 Last updated by: chrisdavidmills,