pyramid

 Question1:

Create Pyramid of  "*"

package abc;

import java.util.Scanner;

public class Pyramid {

       public static void main(String[] args) {

             Scanner scanner = new Scanner(System.in);

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

             int x = scanner.nextInt();

             if(x%2==0) {

                    x=x-1; //if 10 is entered, take 9 only, because the number of x in each row is odd number only.

                    System.out.println("Value of x is changed to nearest odd number = "+x);

             } else {

                    System.out.println("There is no change in x value = "+x);

             }

            

             int numberOfRow = x/2+1;

             int numberofSpacesOnFirstRow=x/2;

             System.out.println("number of rows = "+numberOfRow);      

             System.out.println("numberofSpacesOnFirstRow = "+numberofSpacesOnFirstRow);

//           row 1, 1*, 4 space, row 2, 3*, 3 space, Row 3 5* 2 space , Row 4 7* 1 space

//           space decreases by 1 in each row, star increates by 2 in each row

             int counter =0;

             for(int star=1;star<=x;star=star+2) {

                    for(int spaces=numberofSpacesOnFirstRow-counter;spaces>0;spaces--) {

                           System.out.print(" ");

 

                    }

                    for(int row=1; row<=star;row++) {

                           System.out.print("*");   

                    }

                    System.out.println("\n");

                    counter++;

             }

       }

}

 

Output:

Enter the number 12

Value of x is changed to nearest odd number = 11

number of rows = 6

numberofSpacesOnFirstRow = 5

     *

    ***

   *****

  *******

 *********

***********