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