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E2023: Function needs result type (Delphi)

You have declared a function, but have not specified a return type.

Copy Code
program Produce;

function Sum(A: array of Integer);
var I: Integer;
begin
  Result := 0;
  for I := 0 to High(A) do
    Result := Result + A[I];
end;

begin
end.

Here Sum is meant to be function, we have not told the compiler about it.

Copy Code
program Solve;

function Sum(A: array of Integer): Integer;
var I: Integer;
begin
  Result := 0;
  for I := 0 to High(A) do
    Result := Result + A[I];
end;

begin
end.

Just make sure you specify the result type.

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