Floyd's triangle   lists the natural numbers in a right triangle aligned to the left where

 the first row is   1     (unity)
 successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.


The first few lines of a Floyd triangle looks like this:

 1
 2  3
 4  5  6
 7  8  9 10
11 12 13 14 15



Task

 Write a program to generate and display here the first   n   lines of a Floyd triangle. 
(Use   n=5   and   n=14   rows).
 Ensure that when displayed in a mono-space font, the numbers line up in vertical columns as shown and that only one space separates numbers of the last row.


 
PROGRAM FLOYD
 
!
! for rosettacode.org
!
 
BEGIN
  N=14
  NUM=1
  LAST=(N^2-N+2) DIV 2
  FOR ROW=1 TO N DO
    FOR J=1 TO ROW DO
       US$=STRING$(LEN(STR$(LAST-1+J))-1,"#")
       WRITE(US$;NUM;)
       PRINT(" ";)
       NUM+=1
    END FOR
    PRINT
  END FOR
END PROGRAM
 