Linux shell program/script to create a menu-driven calculator using case.
sum=0 i="y" echo "Enter first number :" read n1 echo "Enter second number :" read n2 while [ $i = "y" ] do echo "1.Addition" echo "2.Subtraction" echo "3.Multiplication" echo "4.Division" echo "Enter your choice" read ch case $ch in 1)sum=`expr $n1 + $n2` echo "Sum ="$sum;; 2)sub=`expr $n1 - $n2` echo "Sub = "$sub;; 3)mul=`expr $n1 \* $n2` echo "Mul = "$mul;; 4)div=`echo $n1 / $n2 | bc -l` echo "Div = "$div;; *)echo "Invalid choice";; esac echo "Do u want to continue ?" read i if [ $i != "y" ] then exit fi done