Write a Shell Script to make a menu driven calculator using case.
clear sum=0 i="y" echo " Enter one no." read n1 echo "Enter second no." 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)sum=`expr $n1 - $n2` echo "Sub = "$sum;; 3)sum=`expr $n1 \* $n2` echo "Mul = "$sum;; 4)sum=`expr $n1 / $n2` echo "Div = "$sum;; *)echo "Invalid choice";; esac echo "Do u want to continue ?" read i if [ $i != "y" ] then exit fi done OUTPUT *********** [04mca58@LINTEL 04mca58]$ sh calculator.sh Enter any no. 121 Enter one no. 21 Enter second no. 58 1.Addition 2.Subtraction 3.Multiplication 4.Division Enter your choice 1 Sum =79 Do u want to continue ? y 1.Addition 2.Subtraction 3.Multiplication 4.Division Enter your choice 2 Sub = -37 Do u want to continue ? y 1.Addition 2.Subtraction 3.Multiplication 4.Division Enter your choice 3 Mul = 1218 Do u want to continue ? y 1.Addition 2.Subtraction 3.Multiplication 4.Division Enter your choice 4 Div = 0 Do u want to continue ? n