Shell Programming and Scripting

I was wondering can anyone give me a clue how to start script which would do the following:

I have 2 numbers as input for example: 100 and 1000 and I need to create file and in that file should be written

100 - 199

200 - 299

300 - 399

400 - 499

500 - 599

600 - 699

700 - 799

800 - 899

900 - 999


U can guess if I have 100 as a number and 100 000 as b number how would it like...
should I start with awk or...

thanks in advance...

Input 1- 100
Input 2 -1000
hope thats what u wanna do....

#! /bin/ksh
typeset -i ranger=$1
typeset -i mark=$2
typeset -i range=`expr $ranger - 1`
while [[ $ranger -lt $mark ]]
do
echo "$ranger "-" `expr $ranger + $range`"
ranger=`expr $ranger + $range`
ranger=`expr $ranger + 1`
done

Code:

#! /usr/bin/ksh

if [ $# -ne 2 ]
then
  echo "<script> first second"
  exit 1
fi

first=$1
second=$2
INTERVAL=$1
while [ $first -lt $second ]
do
  echo "$first---$(($first + $INTERVAL - 1))"
  first=$(($first + $INTERVAL))
done

exit 0

Thank to both of U...I am beginner in shell programming but I figure how scripts work...

THANKS again