Question

The program must prompt for an integer divisor in the range 10-20 and will print all numbers 1-1000 that are divisible by that divisor. You MUST use a while loop for this. Use printf to display the numbers in right-aligned columns, 10 to a line. For example, “%5d” would be the format String to allow a field width of 5 to display the number. If the number entered by the user is out of range just print an error message. (Java)

Answer 1

Thanks for the question.

Below is the code you will be needing  Let me know if you have any doubts or if you need anything to change.

Thank You !!

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import java.util.Scanner;

public class Divisor {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        System.out.print("Enter an integer in the range (10-20): ");
        int divisor = scanner.nextInt();
        int count = 1;
        if (divisor >= 10 && divisor <= 20) {

            int startingNumber = 1;
            int endingNumber = 1000;

            while (startingNumber <= endingNumber) {

                if (startingNumber % divisor == 0) {
                    System.out.printf("%5d", startingNumber);
                    count += 1;
                }
                if (count % 11 == 0) {
                    System.out.println();
                    count=1;
                }
                startingNumber += 1;
            }

        } else {
            System.out.println("Value entered not in range 10 20.");
        }
    }
}

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