Constraints Number will lie between 20 and 400. Output Format Sum according to the value returned by the method or will print Invalid Input in case of number did not match the constraints.

On invalid input, the system prompts the user to re-enter the number or return to the Home Page. Submission Guidelines Complete the Java code for the iCALC Number Converter System.

Want to know more about standard Java I/O concepts like standard input, standard output, and standard error? Read on!

Run the classic “Hello, World!” Java program. Declare two variables—one for the user’s guess, and one for the secret “magic” number. Use conditional logic to check if the guess matches the magic ...