#!/bin/bash clear echo "--------------------------------" echo "-------welcome to calculator----" echo "--------------------------------" echo -e "[a]ddition\n[b]Subtraction\n[c]Multiplication\n[d]Division\n" read -p "Enter your choice: " choice case $choice in [aA]) read -p "Enter first number: " num1 read -p "Enter second number: " num2 result=$((num1+num2)) echo "The result for your choice is: $result" ;; [bB]) read -p "Enter first number: " num1 read -p "Enter second number: " num2 result=$((num1-num2)) echo "The result for your choice is: $result" ;; [cC]) read -p "Enter first number: " num1 read -p "Enter second number: " num2 result=$((num1*num2)) echo "The result for your choice is: $result" ;; [dD]) read -p "Enter first number: " num1 read -p "Enter second number: " num2 result=$((num1/num2)) echo "The result for your choice is: $result" ;; *) echo "Wrong choice" ;; esac