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SubStr

Synopsis

     function SubStr (S: String; FirstChar: Integer): String;

or

     function SubStr (S: String; FirstChar, Count: Integer): String;

Description

SubStr returns a sub-string of S starting with the character at position FirstChar. If Count is given, such many characters will be copied into the sub-string. If Count is omitted, the sub-string will range to the end of S.

If Count is too large for the sub-string to fit in S or if FirstChar exceeds the length of S, SubStr triggers a runtime error. (For a function returning the empty string instead, see Copy.)

Conforming to

SubStr is an ISO 10206 Extended Pascal extension.

Example

     program SubStrDemo;
     var
       S: String (42);
     begin
       S := 'Hello';
       WriteLn (SubStr (S, 2, 3));   { yields `ell' }
       WriteLn (SubStr (S, 3));      { yields `llo' }
       WriteLn (SubStr (S, 4, 7));   { yields a runtime error }
       WriteLn (SubStr (S, 42));     { yields a runtime error }
     end.

See also

Copy, String Slice Access.