How do you write java program Print sum of prime digits of s number?

Answer 1

To write a Java program that prints the sum of the prime digits of a number, you can follow these steps: First, convert the number to a string to access each digit individually. Then, check if each digit (0-9) is prime (2, 3, 5, 7) and, if so, add it to a sum variable. Finally, print the sum. Here’s a simple code snippet:

public class PrimeDigitSum {
    public static void main(String[] args) {
        int number = 123456789; // Example number
        int sum = 0;

        for (char digit : String.valueOf(number).toCharArray()) {
            int d = Character.getNumericValue(digit);
            if (d == 2 || d == 3 || d == 5 || d == 7) {
                sum += d;
            }
        }
        System.out.println("Sum of prime digits: " + sum);
    }
}