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JavaScript is a [[programming language]] designed by Brendan Eich. | |||
== Type system == | |||
JavaScript has '''seven primitive data types''': <code>string</code>, <code>number</code>, <code>bigint</code>, <code>boolean</code>, <code>undefined</code>, <code>symbol</code>, and <code>null</code>. | |||
In addition to these primitives, JavaScript also includes the '''Object type''', which is used to represent more complex data structures and behaviors. | |||
{| class="wikitable" | |||
|+ Data Type Overview | |||
|- | |||
! # !! Data Type !! Description | |||
|- | |||
| 1 || Boolean || A data type with two possible values: true and false. | |||
|- | |||
| 2 || String || A sequence of characters, where even a single character is considered a string. | |||
|- | |||
| 3 || Number || Represents values of type double according to the IEEE 754 standard. The range of integers is limited by the maximum value of 253-1 (due to the width of the mantissa, though the reality is slightly more complex, and the same applies to the negative boundary). | |||
|- | |||
| 4 || Bigint || A special type for integer numeric values used when storing values larger than 253-1. | |||
|- | |||
| 5 || Null || A type with a single value: null. | |||
|- | |||
| 6 || Undefined || A JavaScript specialty (and a headache), representing an unassigned value (note: different from `null`). | |||
|- | |||
| 7 || Symbol || A unique identifier. | |||
|- | |||
| 8 || Object || Represents objects (it may seem odd at first, but functions, for example, are also considered objects). | |||
|} | |||
== External links == | == External links == | ||
https://mashable.com/archive/javascript | https://mashable.com/archive/javascript | ||
[[Category:Programming languages]] | |||
[[Category:Obsolete]] | |||
Latest revision as of 15:23, 23 March 2025
JavaScript is a programming language designed by Brendan Eich.
Type system
JavaScript has seven primitive data types: string, number, bigint, boolean, undefined, symbol, and null.
In addition to these primitives, JavaScript also includes the Object type, which is used to represent more complex data structures and behaviors.
| # | Data Type | Description |
|---|---|---|
| 1 | Boolean | A data type with two possible values: true and false. |
| 2 | String | A sequence of characters, where even a single character is considered a string. |
| 3 | Number | Represents values of type double according to the IEEE 754 standard. The range of integers is limited by the maximum value of 253-1 (due to the width of the mantissa, though the reality is slightly more complex, and the same applies to the negative boundary). |
| 4 | Bigint | A special type for integer numeric values used when storing values larger than 253-1. |
| 5 | Null | A type with a single value: null. |
| 6 | Undefined | A JavaScript specialty (and a headache), representing an unassigned value (note: different from `null`). |
| 7 | Symbol | A unique identifier. |
| 8 | Object | Represents objects (it may seem odd at first, but functions, for example, are also considered objects). |