How to print a symmetrical pyramid ?

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Hello Devs

I want to print a pyramid like shown below

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

Now , consider the code

C#

class StarPyramid
{
    public static void main(String arr[])
    {
    int n=6;
    for(int i=0;i<n;i++)
    {
        for(int j=n;j>=i;j--)
        {
            System.out.print(" ");
        }
        
        for(int k=0;k<i;k++)System.out.print("#");
        //If i use the loop mentioned below , then i get asymmetrical pyramid
        //for(int m=0;m<i;m++)System.out.print("#");        
        
        
        System.out.println(" ");
    }
        
    }
}

What I have tried:

I get asymmetrical pyramid with this. Please explain me the logic to print a symmetrical one and how is mine different in terms of logic. What i am not doing properly ?

Thanks in advance !!

Posted 25-Sep-16 8:46am

Member 12731696

Updated 25-Sep-16 11:24am

v5

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2 solutions

Solution 2

You should learn to use the debugger as soon as possible. Rather than guessing what your code is doing, It is time to see your code executing and ensuring that it does what you expect.

The debugger allow you to follow the execution line by line, inspect variables and you will see that there is a point where it stop doing what you expect.
Debugger - Wikipedia, the free encyclopedia[^]
Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
http://docs.oracle.com/javase/7/docs/technotes/tools/windows/jdb.html[^]
https://www.jetbrains.com/idea/help/debugging-your-first-java-application.html[^]

The debugger is here to show you what your code is doing and your task is to compare with what it should do.
When the code don't do what is expected, you are close to a bug.

Advice: tale a sheet of paper and try to do it by hand, your program should use the same procedure.
Make a table with 3 columns "Line #", "#spaces" and "# stars" and fill it

Posted 25-Sep-16 11:24am

Patrice T

Updated 25-Sep-16 11:29am

v2

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Maciej Los · Accepted Answer · 2016-09-25T10:00:00

Solution 1

Start here:
How To Create Pyramid Of Numbers In Java?[^]
Pyramid Pattern « Java Examples Explained[^]

Posted 25-Sep-16 10:00am

Maciej Los