basic calculator code in java

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The code starts by importing the Scanner class from the java.util package to allow user input.

In the main method, a Scanner object named scanner is created to read input from the user.

The program prompts the user to enter the first number by displaying the message "Enter the first number: ". The user's input is stored in the variable num1 as a double value using scanner.nextDouble().

Similarly, the program prompts the user to enter the second number and stores it in the variable num2.

The program then prompts the user to enter an operator (+, -, *, /) and stores it in the variable operator as a char using scanner.next().charAt(0).

Next, a double variable named result is declared to store the calculated result.

Using a switch statement, the program checks the value of the operator and performs the corresponding operation on num1 and num2. If the operator is not one of the valid options, an error message is displayed, and the program ends using return.

The result is then displayed using System.out.println("Result: " + result).

Finally, the Scanner object is closed to release system resources using scanner.close().

This basic calculator program allows users to enter two numbers and an operator to perform addition, subtraction, multiplication, or division. The calculated result is then displayed on the screen.