# !/usr/bin/ruby -w
# -*- encoding:utf-8 -*-
# filename: main.rb
# author: 简单教程(www.twle.cn)
# Copyright © 2015-2065 www.twle.cn. All rights reserved.

ary = Array.new(13)
puts ary.size  # 返回 13
puts ary.length # 返回 13