Re: do while loop help ( newbie)

["Björn Persson" <spam-away@nowhere.nil>]

isaac2004 wrote:
> thanx for the help i understand about the exit when loop but is there a
> way to do it that uses the for while loop instead because i can do it
> with the exit when but i guess i didnt specify that earlier. thanx for
> the code

The fact that NewNumber was uninitialized the first time the loop 
condition was evaluated is a hint that "while" might not be the best 
solution. You always want to do the calculation at least once, so 
there's no need to have a condition on entering the loop.

There are several ways to do it with "while" anyway. Here are a few:
� Introduce an extra variable "Previous_Number".
� Do the test in the best place and store the result in a boolean 
variable "Done".
� Enclose part of the loop body in an "if" statement so that it's 
skipped the first time.
� Duplicate part of the loop body outside the loop. This gets very ugly 
if more than one or two lines are duplicated.
� Turn part of the loop body into a procedure and call it both inside 
and outside the loop.

None of those are as clean as a loop-and-a-half with "exit when". What's 
wrong with "exit when"?

-- 
Bj�rn Persson                              PGP key A88682FD
                    omb jor ers @sv ge.
                    r o.b n.p son eri nu