#!/bin/sh
printf "Enter a number\n"
read c
x=$c
s=0
while [ $x -gt 0 ]
do
	r=`expr $x % 10`
	s=`expr $sum + $r * $r * $r`
	x=`expr $x / 10`
done
if [ $s -eq $c ]
	then
		echo "It is an armstrong number"
	else
		echo "It is not an armstrong number"
fi