Write a shell script to reverse a given number.

#!/bin/bash
# Script to reverse a given number

echo "Enter a number: "
read num

rev=0
orig=$num   # keep original number for display

while [ $num -gt 0 ]
do
    rem=$((num % 10))            # get last digit
    rev=$((rev * 10 + rem))      # build reverse number
    num=$((num / 10))            # remove last digit
done

echo "Reverse of $orig is: $rev"