BASIC SHELL PROGRAMMING
This is a basic shell program which runs on terminal. It shows the basic operations like how to use 'while ,if , switch case' , how to declare variable , how to print on to console , how to accept values from user , how to use bc , etc .This menu driven program finds the factorial of a number ,fibonacci series and check if the given input is an armstrong number .
a=1while [ $a -eq 1 ] do echo "Menu" echo "1.FACTORIAL" echo "2.FIBONACCI" echo "3.Armstrong" echo "Choice:" read ch case $ch in 1) echo "Enter the num:" read num fact=1 i=$num while [ $i -gt 0 ] do fact=`echo $i \* $fact|bc` i=`echo $i - 1 |bc` done echo "Factorail :" $fact ;; 2) echo "Enter the num" read num n=0 m=1 echo "Fib Series : 0 1 " i=2 while [ $i -lt $num ] do c=`echo $m + $n |bc` echo $c n=$m m=$c i=`echo $i + 1 |bc` done
;;
3) echo "Enter the num"
read num
temp=$num
sum=0
while [ $temp -ne 0 ]
do
k=`echo $temp % 10 |bc`
sum=`echo $sum + $k \* $k \* $k |bc`
temp=`echo $temp / 10 |bc`
done
if [ $sum -eq $num ]
then
echo "The num is Armstrong Number"
else
echo "The num is not a Armstrong Number"
fi ;; *) echo "WRONG INPUT" esac echo "do you want to continue (0/1)? :" read a done |
