Question

Write a Unix Shell Script to print all Armstrong Numbers between 1 and 1000.

Your Program should include following key points:

1. Program should have Header Comments.
2. Program should print all Armstrong numbers between 1 and 1000:

1

153

370

371

407

Answer 1

If you have any doutbs, please give me comment...

i=1

n=1000

while [ $i -le $n ]

do

j=$i

sum=0

while [ $j -gt 0 ]

do

rem=`expr $j % 10`

sum=`expr $sum + $rem \* $rem \* $rem`

j=`expr $j \/ 10`

done

if [ $sum -eq $i ]

then

echo $i

fi

i=`expr $i + 1`

done