# text · Rell standard library · Chromia Docs (concept) > type text An immutable character string data type. Since 0.6.0 Methods charAt Retrieves the 16-bit code of the character at the specified index within this Source: https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/ TYPE # text ```signature type text ``` An immutable character string data type. Since 0.6.0 ## Methods [charAt](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/char-at/) : Retrieves the 16-bit code of the character at the specified index within this text. [char\_at](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/char_at/) : Retrieves the 16-bit code of the character at the specified index within this text. [compareTo](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/compare-to/) : Compares this text to another text lexicographically, based on the Unicode value of each character [compare\_to](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/compare_to/) : Compares this text to another text lexicographically, based on the Unicode value of each character [contains](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/contains/) : Checks if this text contains the specified substring. [empty](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/empty/) : Returns true if this text is empty, false otherwise. [encode](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/encode/) : Converts this text to an array of UTF-8 encoded bytes. [endsWith](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/ends-with/) : Checks if this text ends with the specified suffix. [ends\_with](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/ends_with/) : Checks if this text ends with the specified suffix. [format](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/format/) : Uses this text as a format string and returns the text obtained by substituting the specified [from\_bytes](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/from_bytes/) : Create a text representation of the given bytes. [indexOf](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/index-of/) : Search for the first occurrence of the specified substring within this text. [index\_of](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/index_of/) : Search for the first occurrence of the specified substring within this text. [lastIndexOf](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/last-index-of/) : Returns the index within this text of the last occurrence of the specified string, [last\_index\_of](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/last_index_of/) : Returns the index within this text of the last occurrence of the specified string, [len](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/len/) : Returns the number of characters in this text. [like](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/like/) : Matches this text against the specified SQL LIKE pattern. [lowerCase](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/lower-case/) : Returns the text obtained by converting all alphabetic characters in this text to lower case. [lower\_case](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/lower_case/) : Returns the text obtained by converting all alphabetic characters in this text to lower case. [match\_groups](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/match_groups/) : Match this text against the specified regular expression, returning all match groups in a list. [match\_named\_groups](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/match_named_groups/) : Match this text against the specified regular expression, returning a map whose keys are the names [matches](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/matches/) : Matches this text against the specified regular expression. [regex\_replace](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/regex_replace/) : Returns the text obtained by replacing all subsequences in this text which match the given regular [repeat](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/repeat/) : Repeat this text n times. SQL compatible. [replace](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/replace/) : Returns the text obtained by replacing all occurrences of the substring oldvalue in this text [reversed](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/reversed/) : Returns a reversed copy of this text. SQL compatible. [size](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/size/) : Returns the number of characters in this text. [split](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/split/) : Splits this text around matches of the given delimiter. [startsWith](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/starts-with/) : Checks if this text starts with the specified prefix. [starts\_with](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/starts_with/) : Checks if this text starts with the specified prefix. [sub](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/sub/) : Returns a substring of this text starting from the specified index (inclusive). [to\_bytes](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/to_bytes/) : Converts this text to an array of UTF-8 encoded bytes. [trim](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/trim/) : Returns text matching this one, but with leading and trailing whitespace removed. [upperCase](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/upper-case/) : Returns the text obtained by converting all alphabetic characters in this text to upper case. [upper\_case](https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/text/upper_case/) : Returns the text obtained by converting all alphabetic characters in this text to upper case. [View this page on docs.chromia.com](https://docs.chromia.com/pages/rell-stdlib/-rell%20-system%20-library/%5Broot%5D/text/index.html)Generated API reference, mirrored from the live docs