Floyd's triangle

# title: Floyd's triangle
# source: https://rosettacode.org/wiki/Floyd%27s_triangle
# category: Rosetta Code
# difficulty: Intro
# summary: Generate the opening rows of Floyd's triangle.
# tags: popular, arrays, formatting, sequences
# vibe: 0.2

def floyd_triangle(rows_count)
  rows = []
  current = 1
  row_size = 1

  while row_size <= rows_count
    row = []
    index = 0
    while index < row_size
      row = row.push(current)
      current = current + 1
      index = index + 1
    end
    rows = rows.push(row)
    row_size = row_size + 1
  end

  rows
end

def run
  floyd_triangle(7)
end