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 any positive hard coded number. But, I want the commnad line line to read "Countdown 20" where 20 is the number that the user enters. This is the code I'm working off of. Just don't know how to accept user-input instead of the hard code.
"Hard coded example"
#!/bin/ksh
aa=20
clear
while [ $aa -gt 0 ]
do
echo $aa
((aa=$aa-1))
done
echo
sleep 1
Thank you!