Question

In the following Java program replace conditions in while loops to produce Christmas tree output.

import java.util.Scanner;

public class Tree

{

    public static void main(String[] args)

    {

        int size;

        Scanner scan = new Scanner(System.in);

        System.out.print("Enter the size: ");

        size = scan.nextInt();

        int count = 0;

        while (__________) //??? condition

        {

            int len = 0;

            // print blanks

            while (____________)//??? condition

            {

                System.out.print(' ');

                len++;

            }

            len = 0;

            // print stars

            while (____________)//??? condition

            {

                System.out.print('*');

                len++;

            }

            System.out.println(); // go to next line

            count++;

        }

    }

}

Generated output for the size of 7:

Enter the size: 7

      *

     ***

    *****

   *******

*********

***********

*************

Answer 1

Code:

import java.util.Scanner;
public class Tree
{
public static void main(String[] args)
{
int size;
Scanner scan = new Scanner(System.in);
System.out.print("Enter the size: ");
size = scan.nextInt();
int count = 0;
while (count < size) //to print size of rows.
{
int len = 0;
// print blanks
while (len < size-count)//to print blanks before stars
{
System.out.print(' ');
len++;
}
len = 0;
// print stars
while (len < (2 * count + 1))//to print stars
{
System.out.print('*');
len++;
}
System.out.println(); // go to next line
count++;
}
}
}

output:

Note: my friend if you have any questions or queries comment below. i am happy to answer your all questions. i will sort out your queries. Thank you my friend.