Write a Linux shell script that performs simple arithmetic operation on given input, Unix program to performs simple arithmetic operation i.e addition, multiplication, division, subtraction, modules

Write a Linux shell script that performs simple arithmetic operation on given input, Unix program to performs simple arithmetic operation i.e  addition, multiplication, division, subtraction, modules


Program
clear
echo "Enter first no :"
read a 
echo "Enter second no :"
read b


echo "1. Addition"
echo "2. Subtraction"
echo "3. Multiplication"
echo "4. Division"
echo "5. Modulo operation"
echo "6. Exit"


echo "Enter your choice :"
read ch


case $ch in
  1) echo Answer = 'expr $a+ $b';;
  2) echo Answer = 'expr $a- $b';;
  3) echo Answer = 'expr $a\*$b';;
  4) echo Answer = 'expr $a/$b';;
  5) echo Answer = 'expr $a%$b';;
  6) exit
esac
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