The Wolfram Language incorporates the latest highly efficient algorithms to allow operations on strings with millions of elements, all making use of the Wolfram Language's unique symbolic string patterns.

StringJoin — join strings together

StringSplit — split strings at whitespace, or any specified pattern

StringLength — length of a string (in Unicode characters)

StringPart  ▪  StringTake  ▪  StringDrop  ▪  StringTakeDrop  ▪  StringInsert

StringTrim — trim whitespace etc. from strings

StringRiffle — assemble a string from a list, inserting delimiters

StringExtract — extract numbered parts defined by delimiters

StringReverse — reverse the characters in a string

StringRotateLeft  ▪  StringRotateRight

StringPadLeft  ▪  StringPadRight

StringPartition — partition a string into blocks

InsertLinebreaks — break a string onto multiple lines

StringPosition — find positions of substrings or string patterns

StringCases — give all cases of string patterns in a string

StringCount — count occurrences of a string pattern

StringContainsQ  ▪  StringFreeQ  ▪  StringMatchQ

StringStartsQ  ▪  StringEndsQ  ▪  PalindromeQ

StringReplace — make replacements for substrings or string patterns

StringReplacePart — replace substrings at specified positions

StringReplaceList — do all possible replacements on a string

Character-Oriented Operations »

ToUpperCase  ▪  ToLowerCase  ▪  Capitalize  ▪  CharacterCounts  ▪  ...

Characters — break a string into a list of characters

Sort  ▪  AlphabeticSort  ▪  AlphabeticOrder

Hash — compute hash codes for a string

ImportString, ExportString — translate between many string formats

StringToStream — set up a string to be read sequentially

Read  ▪  Find  ▪  Skip  ▪  SetStreamPosition  ▪  ...

String Data Operations »

SequenceAlignment  ▪  Nearest  ▪  FindClusters  ▪  DictionaryLookup  ▪  ...