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
