Answer:
Following are the code to this question:
//import package
import java.util.*;
public class Full_XmasTree //defining class
{
// defining main method
public static void main(String as[])
{
int X,a,b; //defining integer variable
Scanner obx = new Scanner(System.in); // creating Scanner class object
System.out.print("Please enter: "); //print message
X = obx.nextInt(); // input value from user
for (a = 0; a < X; a++) //defining loop to print pattern
{
for (b = X - a; b > 1; b--)//use loop for print white space
{
System.out.print(" ");//print space
}
for (b = 0; b <= a; b++) // use loop to print values
{
System.out.print("* "); //print asterisk values
}
System.out.println(); //using print method for new line
}
}
}
Output:
please find the attachment.
Explanation:
In the given java code, a class "Full_XmasTree" is declared, in which the main method is declared, inside this method three integer variable "X, a, and b", in this variables "a and b" is used in a loop, and variable X is used for user input.
The Full_XmasTree program illustrates the use of loops
Loops are used for operations that must be repeated until a certain condition is met.
The Full_XmasTree program written in Java where comments are used to explain each action is as follows:
import java.util.*;
public class Full_XmasTree{
public static void main(String as[]) {
//This creates a Scanner object
Scanner input = new Scanner(System.in);
//This prompts the user for the number of rows
System.out.print("Rows: ");
//This gets input the user for the number of rows
int rows = input.nextInt();
//The following iteration prints the full x-mas tree
for (int i = 0; i < rows; i++){
for (int j = rows - i; j > 1; j--){
System.out.print(" ");
}
for (int j = 0; j <= i; j++){
System.out.print("* ");
}
System.out.println();
}
}
}
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