Question

Create in Java: 1. Create a (nested) for loop that given a number prints a line with the number repeated as many times as the number itself, for example: 22 333 4444 000.- 2.Modify the nested for loop to specify in each line if the numbers are even or odd. For example: 1 (odd) 22 (even) 333 (odd) 4444 (even) Dona.... 3. Modify the nested for loop to only print odd numbers. For example: 333 55555 annan..

Answer 1

$\small \color{blue}Answer:\;\;$

import java.util.Scanner;

public class NestedLoops {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter a positive integers: ");
        int n = in.nextInt();

        // 1)
        for (int i = 1; i <= n; i++) {
            for (int j = 0; j < i; j++) {
                System.out.print(i);
            }
            System.out.println();
        }
        System.out.println();

        // 2)
        for (int i = 1; i <= n; i++) {
            for (int j = 0; j < i; j++) {
                System.out.print(i);
            }
            if (i % 2 == 1)
                System.out.println(" (odd)");
            else
                System.out.println(" (even)");
        }
        System.out.println();

        // 3)
        for (int i = 1; 2 * i - 1 <= n; i++) {
            for (int j = 0; j < 2 * i - 1; j++) {
                System.out.print(2 * i - 1);
            }
            System.out.println();
        }
        System.out.println();
    }
}

Enter a positive integers: 5 22 333 4444 55555 1 (odd) 22 (even) 333 (odd) 4444 (even) 55555 (odd) 333 55555

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