How to find the number is Armstrong or not in Unix

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# To find the number is Armstrong or not                   #

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#!/bin/ksh

echo "This program is to find whether given number is Armstrong number or not”

# To make sure sufficient arguments

if [ $# -ne 1 ]

 then

   echo "Please provide one argument"

exit -1

fi

# Declaring and Assigning the values to the local variables

a=$1

s=0

# Logical part to find the Armstrong number

while [ $a -gt 0 ]

do

b=$(( $a%10 ))

s=$(( $s+$b*$b*$b ))

a=$(( $a/10 ))

done

if [ $s -eq $1 ]

then

 echo "The given number is the Armstrong number"

else

 echo "The given number is not Armstrong number"

fi

exit 0

How to find the sum of digits in the number in Unix

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# To find the sum of digits in the number                 #

###########################################################

#!/bin/ksh

# Checking the required arguments

if [ $# -ne 1 ]

 then

   echo "Please provide one argument"

exit -1

fi

# assigning the arguments to the local variables

a=$1

s=0

# Logical part to find the sum of digits in the number

while [ $a -gt 0 ]

do

b=$(( $a%10 ))

s=$(( $s+$b ))

a=$(( $a/10 ))

done

echo "The sum of digits in $1 is $s"

exit 0

How to find whether string is palindrome or not in Unix

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# To find whether the string is palindrome or not                                            #

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#!/bin/ksh

# To make sure the sufficient arguments

if [ $# -ne 1 ]

then

  echo "Please enter one argument"

 exit -1

fi

# Declaring and assigning the values to the local variables

b=`echo $1 | wc -c `

c=$(( $b-1 ))

d=$(( $c/2 ))

flag=1

m=1

# Logical part to handle the palindrome calculations

while [ $m -le $d ]

do

    e=`echo $1 | cut  -c$c`

    f=`echo $1 | cut  -c$m`

    if [ $e != $f ]

      then

          flag=0

          break

    fi

     c=$(( $c-1 ))

     m=$(( $m+1 ))

done

  if [ flag -eq 0 ]

 then

echo "The string is not a palindrome"

else

echo "The string is palindrome"

fi

exit 0