python/concepts/string-methods/introduction.md

# Introduction

A `str` in Python is an [immutable sequence][text sequence] of [Unicode code points][unicode code points].
These could include letters, diacritical marks, positioning characters, numbers, currecy symbols, emoji, punctuation, space and line break characters, and more.

Strings implement all [common sequence operations][common sequence operations], and can be iterated through using `for item in <string>` or `for index, item in enumerate(<string>)` syntax.
Strings can be concatenated with `+`, or via `<str>.join()`, split via `<str>.split(<separator>)`, and offer multiple types of formatting.
To further work with strings, Python provides a rich set of [string methods][str-methods] that can assist with searching, cleaning, transforming, translating, and many other operations.

Being immutable, a `str` object's value in memory doesn't change; methods that appear to modify a string return a new copy or instance of `str`.

[text sequence]: https://docs.python.org/3/library/stdtypes.html#text-sequence-type-str
[unicode code points]: https://stackoverflow.com/questions/27331819/whats-the-difference-between-a-character-a-code-point-a-glyph-and-a-grapheme
[common sequence operations]: https://docs.python.org/3/library/stdtypes.html#common-sequence-operations
[str-methods]: https://docs.python.org/3/library/stdtypes.html#string-methods
[v3] Add level one headings to Markdown files. All Markdown files should, from this point on, start with a level one heading. See https://github.com/exercism/configlet/issues/150 for the rationale behind these changes. The full specification can be found [here](https://github.com/exercism/docs/blob/main/contributing/standards/markdown.md). 2021-02-12 15:08:36 +01:00			`# Introduction`

Edited copy and cleaned up links. 2021-05-04 02:40:49 -07:00			A `str` in Python is an [immutable sequence][text sequence] of [Unicode code points][unicode code points].
			`These could include letters, diacritical marks, positioning characters, numbers, currecy symbols, emoji, punctuation, space and line break characters, and more.`
Add concept introductions Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com> 2021-01-12 16:59:43 +01:00
Edited copy and cleaned up links. 2021-05-04 02:40:49 -07:00			Strings implement all [common sequence operations][common sequence operations], and can be iterated through using `for item in <string>` or `for index, item in enumerate(<string>)` syntax.
			Strings can be concatenated with `+`, or via `<str>.join()`, split via `<str>.split(<separator>)`, and offer multiple types of formatting.
			`To further work with strings, Python provides a rich set of [string methods][str-methods] that can assist with searching, cleaning, transforming, translating, and many other operations.`

			Being immutable, a `str` object's value in memory doesn't change; methods that appear to modify a string return a new copy or instance of `str`.

			`[text sequence]: https://docs.python.org/3/library/stdtypes.html#text-sequence-type-str`
			`[unicode code points]: https://stackoverflow.com/questions/27331819/whats-the-difference-between-a-character-a-code-point-a-glyph-and-a-grapheme`
			`[common sequence operations]: https://docs.python.org/3/library/stdtypes.html#common-sequence-operations`
			`[str-methods]: https://docs.python.org/3/library/stdtypes.html#string-methods`