A String is a list of characters. String constants in Haskell are values of type String.

Class for string-like datastructures; used by the overloaded string extension (-XOverloadedStrings in GHC).

lines breaks a string up into a list of strings at newline characters. The resulting strings do not contain newlines.

words breaks a string up into a list of words, which were delimited by white space.

unlines is an inverse operation to lines. It joins lines, after appending a terminating newline to each.

unwords is an inverse operation to words. It joins words with separating spaces.