my first java calculator
// Importing the Scanner class from java.util package
// Main class that contains the entry point of the program // Creating a Scanner object for user input // Declaring variables to store the numbers entered by the user
// Prompting the user to enter the first number
// Reading and storing the first number entered by the user
// Prompting the user to enter the second number
// Reading and storing the second number entered by the user
// Displaying the menu of operations to the user
// Reading the choice of operation entered by the user
// Using a switch statement to perform the selected operation
// Calling the add() method and displaying the result
// Calling the subtract() method and displaying the result
// Calling the multiply() method and displaying the result
// Checking if the second number is zero to avoid division by zero
// Displaying an error message if the second number is zero
// Calling the divide() method and displaying the result
// Handling an invalid choice entered by the user
// Closing the Scanner object to release resources
// Method to perform addition
// Method to perform subtraction
// Method to perform multiplication
// Method to perform division