questions from a newbie

["zork" <zork@nospam.com>]

Hi, I just started a course in ada. I just have 2 questions at present.

-------------
q1) can:

c : character;

if c in 'A'..'Z' or c in 'a'..'z' or c in '0'..'9' then
   ....
end if;

be written as something like:

c : character;

if c in ('A'..'Z', 'a'..'z', '0'..'9') then
   ....
end if;
-------------

Also, I know you can do the following:

type new_type is array(1..20) of string(1..50);
words : new_type;
index : integer := 20;
words (15) (index ..index) := "K";

however I find that I cannot instead say:

words(15)(index):="K";

why is this so? I get a "Type mismatch in assignment statement, continuing"
error. It does however work when I use words(15)(index):='K'. The rational
behind this is that (index..index) represents a range - hence a string -
whereas (index) represents a single character?

Any insight most helpful.

Cheers,
zork