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Thank you all, once again.

oombera, I understand your code the best because it's a little more simple for me to read and understand, but none of the error messages triggered when I tried it out.
...

what the script is supposed to do is that I want it to accept an integer and do the following:
1. If it's positive and greater than zero, count down to one
2. If no argument is entered at the...

I have one more question about the following lines of code:

#!/bin/ksh

if [ "$1" ]; then
num=$1
while [ $num -gt 0 ]; do
echo $num
((num=num-1))
done
elif [ "$1" ]; then
...

Thank you both so very much!! Works like it's supposed to and how I imagined it would!:)

My command line: /Practice>Countdown 8
Output: 8
Countdown[6]: $num: unknown test operator

this is what it says when executed

Yes, $1 is supposed to be a positive number. I inserted your code that you gave me but it gives me an error about not having a command argument. I tested it with Countdown 8, it would print out the...

I'm sorry if something like this has already been posted, but I didn't find anything like it.

I'm using ksh The code that I've come up with will initially print what I want, but will then keep...

I'm just starting out with UNIX and have figured some stuff out. I just need some help with accepting user input on the command line. For instance, I created a number counter that counts down from...