Shell program to check whether given string is palindrome or not.

# shellpalindrum.sh

# Program :         To check whether given string is palindrome or not.

# Author :           sujith

# Date :              16/03/2015

echo ”To check whether given string is palindrome or not”

echo "Enter the string"

read str

len=$(echo "$str" | wc -c)

while [ $len -gt 0 ]

do

ch=$(echo "$str" | cut -c $len)

          echo -n "$ch"

          s1=$s1$ch

          len=`expr $len - 1`

done

echo ""

if [ $s1 != $str ]

then

echo " The string is not palindrome"

else

echo "The string is palindrome"

fi

OUTPUT:

[141740@localhost ~]$ sh shellpalindrum.sh

To check whether given string is palindrome or not

Enter the string

malayalam

malayalam

The string is palindrome

[141740@localhost ~]$

[141740@localhost ~]$ sh shellpalindrum.sh

To check whether given string is palindrome or not

Enter the string

english

hsilgne

 The string is not palindrome

[141740@localhost ~]$