# Shell Programming
# Arithmetic Operations
echo “Menu”
echo “1 – Addition”
echo “2 – Subtraction”
echo “3 – Multiplication”
echo “4 – Division”
echo -n “Enter your choice : ”
read n
echo -n “Enter the numbers : ”
read a b
case $n in
1) echo “Sum of $a and $b is `expr $a + $b`”;;
2) echo “Difference of $a and $b is `expr $a – $b`”;;
3) echo “Product of $a and $b is `expr $a \* $b`”;;
4) echo “Division of $a by $b is `expr $a / $b`”;;
*) echo “Invalid choice”;;
esac