函数

hán shù


哦,这个词很重要! "函数"就是数学里的一个概念,简单说就是:你给它一个数,它就给你返回另一个数。就像一台机器,你放进去一个东西,它就出来另一个东西。 比如你在数学课上会说:"这个函数是 y = 2x,当 x 是 3 的时候,y 就是 6。" 就是这么用的。 在编程里,"函数"也很常见,意思差不多——就是一段代码,你调用它,它帮你做一件事,然后给你一个结果。比如你可以说:"我写了一个函数,它可以计算两个数的和。" 或者:"你调用这个函数的时候,记得传入正确的参数。" 不管是数学还是编程,"函数"的核心意思都是一样的:输入一个东西,输出另一个东西。

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