Explain creating a pyramid in Java

Question

I am in a beginner java programming class and currently reviewing loops. If there is one thing I just do not understand, it\'s pyramids. I have researched the book exercis

Answer 1

We can make pyramid with one for loop as well, making it performance efficient code in terms of execution time.

Here is the code which prints pyramid of asterisk.

public class PyramidPrinting {

    public static void main(String[] args) {
        int h = 5;
        int i,j;
        char[] arr = new char[2*h-1];

        for(i=h-1,j=h-1; i>=0 && j<=2*h-1; i--,j++){
            arr[i]='*';
            arr[j]='*';
            System.out.println(arr);
        }
    }
}

output:

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