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.


function floydtriangle(rows)
    r = collect(1:div(rows *(rows + 1), 2))
    for i in 1:rows
        for j in 1:i
            print(rpad(lpad(popfirst!(r), j > 8 ? 3 : 2), j > 8 ? 4 : 3))
        end
        println()
    end
end
 
floydtriangle(5); println(); floydtriangle(14)
 
 