Sum Of Two Digits in Java

 import java.util.Scanner;

public class SumOfTwoDigits {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // Read a two-digit number from the user
        System.out.print("Enter a two-digit number: ");
        int number = scanner.nextInt();

        // Check if the number has exactly two digits
        if (number >= 10 && number <= 99) {
            int firstDigit = number / 10;       // Get tens digit
            int secondDigit = number % 10;      // Get ones digit
            int sum = firstDigit + secondDigit;

            System.out.println("Sum of digits = " + sum);
        } else {
            System.out.println("Please enter a valid two-digit number.");
        }

        scanner.close();
    }
}

1. Start
2. Read a two-digit number and store it in number
3. Check if number is between 10 and 99
    a. If not, display "Invalid input" and stop
4. Extract the first digit: firstDigit = number / 10
5. Extract the second digit: secondDigit = number % 10
6. Calculate the sum: sum = firstDigit + secondDigit
7. Print the result
8. End