变量初始化

 1 const
 2 {$J+}
 3   num: Integer = 1;
 4 {$J-}
 5 begin
 6   Inc(num);
 7   ShowMessage(IntToStr(num)); {2}
 8 end;
 9 
10 //或者写作:
11 const
12 {$WRITEABLECONST ON}
13   num: Integer = 1;
14 {$WRITEABLECONST OFF}
15 begin
16   Inc(num);
17   ShowMessage(IntToStr(num)); {2}
18 end;

1 var
2   FilePath : string;
3 
4 implementation
5 
6 initialization
7   FilePath := ExtractFilePath(Application.ExeName) + ‘Test.xml‘; {..\Test.xml}
8 
9 end.