How to print this pyramid pattern?

[polaryeti]

I want this pattern, what's the logic behind this one? There are lots of blogs online that show code but not teach technique. Share any blogs that you know that teach the logic behind it as well.

At i=1, j=5 should be printed as star, rest as white spaces

At i=2, j=4,6…

At i=3, j=3,5,7….

At i=4,j=2,4,6,8…

At i=5, j=1,3,5,7,9…

 

How do I convert this into logic?

 

[requinix]

What code have you tried so far and what did it output?

[polaryeti]

for (i = 1; i <= 5; i++) {
  for (space = 1; space <= 5 - i; space++) {
    document.write("0");
  }
  for (j = 1; j <= i; j++) {
    document.write("X0");
  }
  document.write("<br>");
}

 

I got help from tutorial video to solve this.

[requinix]

That's functional but not quite what modern Javascript code is supposed to look like. Want to spend some time improving it with our help?

[Barand]

7 hours ago, polaryeti said:

How do I convert this into logic?

If there are N rows, each row r comprises (N-r) spaces followed by "* " (star-space) repeated r times.