#!/usr/bin/ksh
# a script to handle yes or no responses
read user_resp?"Answer (yes or no)? "
#determine whether response was negative or affirmative
typeset -u user_resp
case $user_resp in
Y|YE|YES)
	print "Your answer was affirmative!"
	;;
N|NO)
	print "Your answer was negative!"
	;;
*)
	print "I don't know what you are saying!"
	;;
esac