Shell Script to Check if the Number is Palindrome or Not

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.

And if you found this post helpful, then please help us by sharing this post with your friends. Thank You

One comment

  1. can you pls explain why you have used on=$n? what does that mean?

Leave a Reply

%d bloggers like this: