Re: Ill positioned 'until' keyword

[Bob Proulx]

Peng Yu wrote:
> I looks a little wired why 'until' is the way it is now.
> ...
> until test-commands; do consequent-commands; done
> while ! test-commands; do consequent-commands; done

In the original Bourne shell there is no '!' operator.  The 'until'
was a way to negate the expression without using a '!' which didn't
exist in that shell.  An 'if' could operate using the 'else' clause.
But there wasn't any other way to do it in a while loop.  The addition
of '!' to the language was one of the best features.  IMNHO.  I use it
all of the time now.

Bob