Translations:User:Psychoslave//Lua reference manual translation stub/2280/en

The optional numerical arguments  and   can be used to specify a substring of   to be parsed, rather than the entire string. is the position of the first character of the substring, and defaults to 1. is the position of the last character of the substring, and defaults to the length of the string. Both  and   can be negative, as in string.sub.