#!/bin/sh -u
#  $0 number
# This script shows the numbers from one to the number on the command line.
# It does it twice.
#
# WARNING: Many of the comments in this file are "Instructor-Type"
#   comments and are *not* appropriate for real scripts.  Do not put
#   "Instructor-Type" comments into the scripts that you submit for marking.
#   I put them in my example files because I am teaching you how to
#   write scripts; do not submit my teaching comments back to me again.
#   Read the week7.txt notes for more details on good comment style.
#
# -IAN! idallen@.ca

export PATH=/bin:/usr/bin
umask 022

# -ne is a numeric test
#
if test $# -ne 1 ; then
	# error messages go on standard error
	# error messages explain exactly what was found and what is wrong
	echo 1>&2 "Expecting one argument; found $# ($*)"
	exit 1
fi

x=0
# this uses the "test" command explicitly
while test "$x" -lt "$1" ; do
    let x=x+1
    echo "The value of x is $x"
done

x=0
# this uses the "test" command implicitly (called '[')
while [ "$x" -lt "$1" ]; do
    let x=x+1
    echo "The value of x is $x"
done