Delphi Compiler Error
X1019 For loop control variable must be simple local variable
Reason for the Error & Solution
This error message is given when the control variable of a for statement is not a simple variable (but a component of a record, for instance), or if it is not local to the procedure containing the for statement.
For backward compatibility reasons, it is legal to use a global variable as the control variable – the compiler gives a warning in this case. Note that using a local variable will also generate more efficient code.
program Produce;
var
I: Integer;
A: array [0..9] of Integer;
procedure Init;
begin
for I := Low(A) to High(a) do (*<-- Warning given here*)
A[I] := 0;
end;
begin
Init;
end.
program Solve;
var
A: array [0..9] of Integer;
procedure Init;
var
I: Integer;
begin
for I := Low(A) to High(a) do
A[I] := 0;
end;
begin
Init;
end.
