Node:SubStr, Next:, Previous:String2CString, Up:Reference



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.