This built-in string predicate removes the trailing whitespace characters from the argument string. To remove the leading and trailing whitespaces use trim/1 and to remove leading whitespaces there is the predicate triml/1.
see also: &/2 delete/3 expand_sq/1insert/3 is/2 substring/3 string_list/2 to_lower/1 to_string/2 to_upper/1 trim/1 triml/1 working with strings
| Examples | |
| X is_string trimr(' abcd '). | variable X is unified with the string ' abcd' |
| X is_string trimr(' a b f '). | variable X is unified with the string ' a b f' |
| Exceptions | |
| The parameter is an empty variable | an instantiation_error exception is thrown |