UNIX for Dummies Questions & Answers

unknown-hacker|544> count.sh 1 3
1
2
3

#!/bin/bash

declare -i INDEX
declare -i RESULTS
if [ $1 -gt $2 ]; then
    INDEX=$1
    while [[ $INDEX -gt $2 ]] || [[ $INDEX -eq $2 ]]; do
        echo $INDEX
        INDEX=$INDEX-1
    done
elif [ $1 -le $2 ]; then
    INDEX=$1
    while [[ $INDEX -le $2 ]] || [[ $INDEX -eq $2 ]]; do
        echo $INDEX
        INDEX=$INDEX+1
    done
else
    echo $1

if [[ $# != 2 ]]
then
   echo "ERROR - Number of arguments is not equal to 2"
   exit 1
fi

case $1 in
  *[^0-9]*) echo "ERROR - First argument is not integer"
  exit 1
  ;;
esac

case $2 in
  *[^0-9]*) echo "ERROR - Second argument is not integer"
  exit 1
  ;;
esac


if (( $1 > $2 ))
then
    for ((i=$1;i>=$2;i--))
    do
       echo $i
    done
elif (( $1 < $2 ))
then
    for ((i=$1;i<=$2;i++))
    do
       echo $i
    done
else
    echo $1
fi

seq 1 3