Standard String Library (string) capitalize(s) -- upper case first letter capwords(s) -- upper case each word upper(s) -- upper case every letter lower(s) -- lower case every letter ljust(s, width) -- left justify in width center(s, width) -- center in width rjust(s, width) -- right justify in width count(substring, s) -- count occurrences find(s, substring) -- find first occurrence rfind(s, substring) -- find from right end replace(s, old, new) -- replace first occurrence strip(s) -- remove whitespace on both ends rstrip(s) -- remove whitespace from end lstrip(s) -- remove whitespace from front split(s, char) -- split into list of substrings join(stringList) -- concatenate list into string