Narayan Singh

• Feb 21st, 2006

 

print("Please enter a string ");
$input_string = <STDIN>;
chop($input_string);
$rev_string = reverse($input_string);

if($input_string eq $rev_string){
 print("The string is a palindrome");
}else{
 print("The string is NOT a palindrome");
}

raj

• May 13th, 2006

 

this is perl. writing a shell script to do the job is difficult.

bwc

• Jun 9th, 2006

 

Actually you can do this..if [ -z "echo $var | rev | sed -e "s/^$var$//"" ]; then echo pali; else echo nopali; fi

Mukund

• Jul 6th, 2006

 

Hey frnds ,

Cant we write that using control statements like if!!!!

========================================

var=hai

var1=`echo $var|rev`

if [ $var != $var1 ] ; then                                                                                      
echo  $var is not palindrome.                                                                                                                      
else                                                                                                                              
echo  $var is palyndrome 

fi                                                                                                           
                                       

Nonsense

• Aug 16th, 2006

 

# bash-script: VAR=lagerregalif [[ "$VAR" == `echo $VAR | rev` ]]then echo palindromelse echo no palindromfi

vibs

• Nov 20th, 2006

 

echo -n "Enter number : "
read n

# store single digit
sd=0

# store number in reverse order
rev=""

# store original number
on=$n

while [ $n -gt 0 ]
do
    sd=$(( $n % 10 )) # get Remainder
    n=$(( $n / 10 ))  # get next digit
    # store previoues number and current digit in rev
    rev=$( echo ${rev}${sd} )
done

if [ $on -eq $rev ];
then
  echo "Number is palindrome"
else
  echo "Number is NOT palindrome"
fi

Kunal

• Dec 12th, 2006

 

!#/bin/sh

# To check whether the entered number is palindrome or not.

echo "Enter a number: "

read NUM1

echo $NUM1 > file.txt

NUM2=`rev file.txt`

if [ $NUM1 -eq $NUM2 ]; then

echo "Entered Number $NUM1 is a palindrome."

else

echo "Entered Number $NUM1 is not a palindrome."

fi

swaroopa

 Profile Answers by swaroopa 

• Jun 22nd, 2007

 

//Hi, this is for strings

#!/bin/sh

echo "enter a string"
read str

var1=`echo $str|rev`
if [ $var1 != $str ] ; then
echo "no pali"
else
echo "pali"
if

//this is for numbers

#!/bin/sh

echo "Enter a number to find for palindrome"
read num1
num=$num1
i=0

while [ $num -gt 0 ]
do
i=`expr $i * 10 +  $num % 10`
num=`expr $num / 10`
done

if [ $i -eq $num1 ] ; then
echo "$num1 is a palindrome"
else
echo "$num1 is not a palindrome"
f

sudhir

• Sep 15th, 2007

 

can u please  explain the statement rev=$(echo ${f}${f1}) please.
I did  not understand  how its working.

Vivek12

 Profile Answers by Vivek12 

• Jun 4th, 2008

 

echo enter a string
read string
len=`expr length "$string"`
i=$len
reverse=''
while [ $i -gt 0 ]
do
char=`echo $string | cut -c $i`
reverse="$reverse$char"
i=`expr $i - 1`
done
echo string:$string
echo reverse:$reverse
if [ $reverse = $string ]
then
echo its a palindrome
else
echo its not a palindrome
fi

Hope this helps :)

my_thoughts

 Profile Answers by my_thoughts 

• Feb 14th, 2010

 

read string1
string_rev=`rev string1`
if [ string1 = string_rev ]
then
 echo palindrome
else
 echo not a palindrome
fi

Shanthi

• Jun 26th, 2014

 

st1="abc"
for (( i=$len-1; i>=0; i-- ))
do
reve="$reve${st1:$i:1}"
done

Tigran Petrosyan

• Oct 23rd, 2014

 

Code
string="asasa"


for ((i=0; i<${#string}/2; i++))


{


  start=${string:$i:1}


  end=${string:${#string}-$i-1:1}


  if [[ $start != $end ]]; then


    echo "no palindrome"


    exit 1


  fi


}


echo "palindrome"


exit 0

Mohit

• Nov 14th, 2014

 

Code
echo "$string" >> /temp/file.tmp


 


rev_str=`rev /temp/file.tmp`;


 


 if [[ "$rev_str" == "$string" ]]


        then


        echo palindrome


        else


        echo "non-palindrome"


fi

yogesh Gavhane

• Oct 27th, 2015

 

#!/bin/bash
read -p "enter a string::" s1
echo $s1 > /tmp/s1.txt
s2=`rev /tmp/s1.txt`
if [ $s1 = $s2 ]; then
echo "your string is palindrome"
else
echo "not a palindrome"
fi

Ather Ahmed

• Nov 9th, 2015

 

#!/bin/bash
echo -n "Enter the string : "
read string
checkIfPalindrome() {
if [ $(echo "$1") != $(echo "$1" | rev) ]
then echo "$string is not a palindrome"
else echo "$string is a palindrome"
fi
}
actualstring=$(echo "$string" | sed s/[ ]*//g)
check=$(echo "$actualstring" | egrep -i ^[a-z]*$ | wc -w)
if [ $check != 0 ]
then checkIfPalindrome $actualstring
else echo "The value entered is not a string!"
exit
fi

Ravi

• Mar 4th, 2016

 

#!/bin/bash
text=$1;
len=`echo "$text"|awk {print length}`
j=$(($len / 2));
for ((i=1,k="$len";i<="$j";i++))
do
if [ `echo $1|cut -c"$i"` = `echo $1|cut -c"$k"` ]
then
k=$((k - 1))
continue
else
echo "not palindrome"
exit
fi
done
echo "palindrome"

amita

• Apr 1st, 2016

 

#!/bin/bash
echo "Enter Number"
read number
number=$1
number1="echo $1 | rev"
if [ $number -eq $number1 ];
then
echo "Number is palindrome"
else
echo "Number is NOT palindrome"
fi

pratap reddy

• Apr 18th, 2016

 

#!/bin/bash
read -p "Enter string:" string
len=${#string}
for (( i=$len-1; i>=0; i-- ))
do
reverse="$reverse${string:$i:1}"
done
echo "$reverse"
if [ $reverse = $string ]
then
echo " palindrome "
else
echo " not palindrome "
fi

shubham garg

• Apr 20th, 2016

 

#!/bin/bash
echo enter the number
read a
b=`echo $a|rev`
test "$a" == $b && echo your number is palindromic || echo your number is not palindromic

Code
#!/bin/perl


print "enter the number


";


chomp($a=<stdin>);


$ab=reverse("$a");


if ( "$a" eq "$ab" )


{


print "your number is palindromic 


";


}


else


{


print "your number is not palindromic 


";


}

Richa

• May 21st, 2016

 

#!/bin/sh
read -p "Enter the string" str
str_new=$str
reverse_str=`echo "$str" | rev`
if [ $str_new == $reverse_str ]; then
echo "Palindrome"
else
echo "Not a palindrome"
fi

uma

• May 24th, 2016

 

#!/bin/sh
read -p "Enter the string" str
str_new=$str
reverse_str=`echo "$str" | rev`
if [ $str_new = $reverse_str ]
then
echo "Palindrome"
else
echo "Not a palindrome"
fi

raghwendra ranbir

• Aug 18th, 2016

 

#!/bin/bash
read -p "please enter the string" string
length=${#string}
while [ $length -gt 0 ]
do
rev_str=revs_str`echo $string|cut -c$length`
length=$length -1
done
echo "$rev_str"

Mohsin Khan

• Jan 6th, 2017

 

#!/bin/sh
echo "please enter the string"
read string
length=${#string}
while [ $length -gt 0 ]
do
rev_str=$rev_str`echo $string|cut -c$length`
length=$length -1
done
echo "$rev_str"
if [ $string = $rev_str ]
then
echo "Palindrome"
else
echo "Not a palindrome"
fi

sujit kumar

• May 4th, 2017

 

#!/bin/bash
echo -n "Enter a string: "
read str
if [ $(echo $str | rev) = $str ]
then
echo "$str is palindrome."
else
echo "$str is not palindrome"

armaan mahajan

• May 21st, 2017

 

#!/bin/bash
echo "please enter the string"
read string
string_new=$string
reverse_string=`echo $string|rev`
if [ $reverse_string -eq $string_new ];
then
echo "String is palindrome"
else
echo "string is not palindrome"
fi