RosettaCodeData/Task/URL-encoding/Free-Pascal/url-encoding.free

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function urlEncode(data: string): AnsiString;
var
ch: AnsiChar;
begin
Result := '';
for ch in data do begin
if ((Ord(ch) < 65) or (Ord(ch) > 90)) and ((Ord(ch) < 97) or (Ord(ch) > 122)) then begin
Result := Result + '%' + IntToHex(Ord(ch), 2);
end else
Result := Result + ch;
end;
end;