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Add separation between primitives and objects to the summary

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Alexey Chilipenko 2022-06-21 13:07:51 +03:00
parent 7964b11b8f
commit 81fb2ab549
1 changed files with 10 additions and 8 deletions
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1-js/02-first-steps/05-types/article.md
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@ -263,14 +263,16 @@ Some people prefer `typeof(x)`, although the `typeof x` syntax is much more comm
There are 8 basic data types in JavaScript.
- `number` for numbers of any kind: integer or floating-point, integers are limited by <code>±(2<sup>53</sup>-1)</code>.
- `bigint` is for integer numbers of arbitrary length.
- `string` for strings. A string may have zero or more characters, there's no separate single-character type.
- `boolean` for `true`/`false`.
- `null` for unknown values -- a standalone type that has a single value `null`.
- `undefined` for unassigned values -- a standalone type that has a single value `undefined`.
- `object` for more complex data structures.
- `symbol` for unique identifiers.
- Seven primitive data types:
- `number` for numbers of any kind: integer or floating-point, integers are limited by <code>±(2<sup>53</sup>-1)</code>.
- `bigint` for integer numbers of arbitrary length.
- `string` for strings. A string may have zero or more characters, there's no separate single-character type.
- `boolean` for `true`/`false`.
- `null` for unknown values -- a standalone type that has a single value `null`.
- `undefined` for unassigned values -- a standalone type that has a single value `undefined`.
- `symbol` for unique identifiers.
- And one non-primitive data type:
- `object` for more complex data structures.
The `typeof` operator allows us to see which type is stored in a variable.