# 章序号/节序号/节/笔记序号 codecademy, Variable # 概念阐释 # 举例子 # 类比、比较与对比 # 问题 Dogs mature at a faster rate than human beings. We often say a dog’s age can be calculated in “dog years” to account for their growth compared to a human of the same age. In some ways we could say, time moves quickly for dogs — 8 years in a human’s life equates to 45 years in a dog’s life. How old would you be if you were a dog? Here’s how you convert your age from “human years” to “dog years”: - The first two years of a dog’s life count as 10.5 dog years each. - Each year following equates to 4 dog years. Before you start doing the math in your head, let a computer take care of it! With your knowledge of math operators and variables, use JavaScript to convert your human age into dog years. *hint: 可以直接写成公式（10.5X2）+（myAge-2）x4 *想好variable name* **1.** [题目步骤](https://www.codecademy.com/courses/introduction-to-javascript/projects/dog-years-javascript) **2.** 尝试用function写？ # 问题答案 **1.** [答案](https://www.codecademy.com/workspaces/63bcd35fccf79a776f65a4ae) **2.** - 可以用function调用所有步骤了，但是不会重复调用，比如我想改成小柔的名字就不会了。[练习页面](https://www.codecademy.com/workspaces/63bcd35fccf79a776f65a4ae) # 备注（经验集/错误集）