Ruby 打印九九乘法表

as = 1..9
  
as.each do |a|
  (1..a).each do |b|
    a = a.to_i
    b = b.to_i

    # s 用作对齐
    s = a*b >= 10 ? " " : "  "
    print " #{b} * #{a} = #{a*b}#{s}"
  end
  puts " \n"
end