Answer to Question #233995 in Java | JSP | JSF for jeffy

Question

Write a program that prompts the user for an integer and then prints out all coward numbers up to

that integer. For example, when the user enters 20, the program should print: 3 4 6 8 12 14 18 20.

Recall that a number is a prime number if it is not divisible by any number except 1 and itself.

Hint: Use Nested Loop to solve this problem. Outer Loop iterations must start from 3 and ideally inner

loop iterations must start from 2.

Coward Number: Number whose previous number is not divisible by any number other than 1

and number itself.

Instructions:

1. Create a program called CowardNumbers.java.

2. Create appropriate variables and assign values using a Scanner object.

Answer 1

import java.util.Scanner;


public class CowardNumbers {
	public static void main(String[] args) {
		Scanner keyBoard = new Scanner(System.in);
		int N = keyBoard.nextInt();
		System.out.print("3 ");
		for (int number = 3; number <= N; number++) {
			boolean is_Prime = true;
			for (int i = 2; i <= number / 2; i++) {
				if (number % i == 0) {
					is_Prime = false;
					break;
				}
			}
			if (is_Prime) {
				System.out.print((number + 1) + " ");
			}


		}


		keyBoard.close();
	}
}