echo "Enter one no."
read n1
echo "Enter second no."
read n2
echo "1.addition"
echo "2.subtraction"
echo "3.multiplication"
echo "4.division"
echo "5.square"
echo "6.squareroot"
echo "7.modular"
echo ----------------
echo "Enter your choice:"
read ch
echo ----------------
case $ch in
1)echo "Addition = " `expr $n1 + $n2`;;
2)echo "Subtaction = " `expr $n1 - $n2`;;
3)echo "Multiplication = " `expr $n1 * $n2`;;
4)echo "Division = " `expr $n1 / $n2`;;
5)
echo You selected \"Square\"
echo Enter Number
read number
echo ----------------
echo "Square of $number = " $(( $number * $number ));;
6)
echo You selected \"Squareroot\"
echo Enter Number
read number
echo ----------------
calc=$(echo "sqrt ( $number )" | bc -l) ;
echo "Sqaure root of $number" $calc;;
7)echo "Modulus = " `expr $n1 % $n2`;;
*)echo "Invalid Choice";;
esac
echo "Do you want to continue ?"
read i
case $i in
"y")sh cal.sh;;
*)exit 2;;
esac