Thread: HELP WITH FOR LOOPS! trying to concatenate without using string builder

I am trying to make this outcome: basically adding an asterisk more each line.

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

but i dont want to use this code:
*\n**\n***\n****\n*****\n etc.

so far my code looks like this:
message = "";
String stars = "*";
for (int i=1; i<8; i++)
{
message = message + stars + "\n";

}
JOptionPane.showMessageDialog(null, message);

Originally Posted by janeeatsdonuts

I am trying to make this outcome: basically adding an asterisk more each line.

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

but i dont want to use this code:
*\n**\n***\n****\n*****\n etc.

so far my code looks like this:
message = "";
String stars = "*";
for (int i=1; i<8; i++)
{
message = message + stars + "\n";

}
JOptionPane.showMessageDialog(null, message);

Great.

Now do you have an actual question that we can answer?

uhm.
the output for my code is:
*
*
*
*
*
*
*
instead of

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

i want to make
*
*
*
*
*
*
*
into
*
**
***
****
*****
******
*******
how do i make it into:
*
**
***
****
*****
******
*******

Figure out the logic first. I would do something like:

On row 0 I want 1 star
On row 1 I want 2 stars
on row 2 I want 3 stars
 
... 
 
on row x I want (x + 1) stars
 
... 
 
stop at row y.

Then translate that into pseudo code

begin loop that will loop y times.
  print (loop index + 1) stars
  print new line
end loop

That line "print loop index + 1 stars can be further broken down into its own loop.

begin loop that will loop y times.
  // print (loop index + 1) stars
  create an inner loop that loops from 0 to the current (outer loop's index + 1)
    print a "*"
  end inner loop
 
  print new line
end loop

Now you try to translate the pseudo-code into Java code.