Same as |match()|, but return the matched string. Example: :echo matchstr("testing", "ing") results in "ing". When there is no match "" is returned. The {start}, if given, has the same meaning as for |match()|. :echo matchstr("testing", "ing", 2) results in "ing". :echo matchstr("testing", "ing", 5) result is "". When {expr} is a |List| then the matching item is returned. The type isn't changed, it's not necessarily a String. Can also be used as a |method|: GetText()->matchstr('word')