Meet arrays

An array is a row of variables sharing one name, numbered from a low to a high index. In SA schools we almost always start at 1:

var
  arrMarks : array[1..5] of Integer;
begin
  arrMarks[1] := 78;      // first box
  arrMarks[5] := 67;      // last box

Arrays and FOR loops are inseparable — the loop variable becomes the index:

for i := 1 to 5 do
  memOutput.Lines.Add(IntToStr(arrMarks[i]));

Parallel arrays hold related data at matching positions: arrNames[3] and arrMarks[3] describe the same learner. Exam papers give you data as constant arrays exactly as in this exercise's starter code.

Go outside the range (like index 6 in a 1..5 array) and your program crashes — try it and read the error we give you.

const
  arrNames : array[1..5] of String = ('Thabo', 'Lerato', 'Anele', 'Sipho', 'Zanele');
  arrMarks : array[1..5] of Integer = (78, 45, 90, 33, 67);

procedure TfrmClass.btnListClick(Sender: TObject);
var
  i : Integer;
begin
  for i := 1 to 5 do
    memOutput.Lines.Add(arrNames[i] + ': ' + IntToStr(arrMarks[i]));
end;