Shell Script to Check if the Number is Palindrome or Not

A shell script is a computer program designed to be run by the Unix shell, a command-line interpreter. The various dialects of shell scripts are considered to be scripting languages. Typical operations performed by shell scripts include file manipulation, program execution, and printing text. A script that sets up the environment, runs the program, and does any necessary cleanup, logging, etc. is called a wrapper.

In this post, we will write a shell script to check whether the number is palindrome or not.

INPUT:
line 1: number

OUTPUT:
Print “palindrome” if the number is palindrome else print “not palindrome”

The following is the shell script to check whether the number is palindrome or not:

echo enter n
read n
num=0
on=$n
while [ $n -gt 0 ]
do
num=$(expr $num \* 10)
k=$(expr $n % 10)
num=$(expr $num + $k)
n=$(expr $n / 10)
done
if [ $num -eq $on ]
then
echo palindrome
else
echo not palindrome
fi

OUTPUT:

$ enter n
$ 121
$ palindrome

Let us know in the comments if you are having any questions regarding this shell script.

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