Shell Script to Find Whether an Input Number is Palindrome or Not

Palindrome is a word, phrase, number or other sequence of units that has the property of reading the same in either direction (the adjustment of punctuation and spaces between words is generally permitted). Composing literature in palindromes is an example of constrained writing. The word "palindrome" was coined from Greek roots palin ("back") and dromos ("way, direction") by English writer Ben Jonson in the 1600s.

A palindromic number is a number where the digits, with decimal representation usually assumed, are the same read backwards, for example, 58285. They are studied in recreational mathematics where palindromic numbers with special properties are sought. A palindromic prime is a palindromic number that is a prime number.

Program: 
echo -n "Enter number : "
 read n

# store single digit
sd=0

# store number in reverse order
 rev=""

# store original number
on=$n

 while [ $n -gt 0 ]
 do
 sd=$(( $n % 10 )) # get Remainder 
n=$(( $n / 10 ))  # get next digit

  # store previous number and current digit in reverse
  rev=$( echo ${rev}${sd} ) 
done  
if [ $on -eq $rev ]; 
then   
echo "Number is palindrome"
 else 
echo "Number is not palindrome"
 fi