Write a script to check whether a given string is palindrome or not

File Name : ex20.sh

clear

echo "Enter String : \c"

read s

p=$s

m=`expr $s | wc -c`

i=`expr $m - 1`

while [ $i -ge 1 ]

do

            k=`expr $s | cut -c$i`

            r=$r$k

            i=`expr $i - 1`

            echo $k

done

            echo $r

if [ "$p" != "$r" ]

then

            echo "It is not palindrome"

else

            echo "It is palindrome"

fi