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.


triangle = (array) -> for n in array
    console.log "#{n} rows:"
    printMe = 1
    printed = 0
    row = 1
    to_print = ""
    while row <= n
        cols = Math.ceil(Math.log10(n * (n - 1) / 2 + printed + 2.0))
        p = ("" + printMe).length
        while p++ <= cols
            to_print += ' '
        to_print += printMe + ' '
        if ++printed == row
            console.log to_print
            to_print = ""
            row++
            printed = 0
        printMe++
 
triangle [5, 14]