Pos function

Declaration

function Pos(const substr: shortstring; const s: shortstring; 
 Offset: SizeInt=1): SizeInt

Description

Pos returns the index of Substr (or character c)in S, if S contains Substr. In case Substr isn't found, 0 is returned. The search is case-sensitive. The character version uses an optimized version of the search algorithm.

In case Offset is specified, the search starts at position Offset (1-based) in the string; The position Offset is also checked in the search.

Errors

None

See also

• Length
• Copy
• Delete
• Insert
• posEx

Example: ex48

Program Example48;

{ Program to demonstrate the Pos function. }

Var
  S : String;

begin
  S:='The first space in this sentence is at position : ';
  Writeln (S,pos(' ',S));
  S:='The last letter of the alphabet doesn''t appear in this sentence ';
  If (Pos ('Z',S)=0) and (Pos('z',S)=0) then
    Writeln (S);
end.