“功能”与“功能”之间的区别是什么？和“程序”？ [英] What is the difference between a "function" and a "procedure"?

问题描述

一般来说，我们都听说过编程语言中的函数或过程。然而，我发现我几乎可以互换地使用这些术语（这可能是非常错误的）。

所以，我的问题是：

它们在功能，目的和用途方面有什么不同？

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解决方案

一个函数返回一个值，一个过程只是执行命令。 b
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名称函数来自数学。它用于根据输入计算一个值。

一个过程是一组可以按顺序执行的命令。

在大多数编程语言中，偶函数可以有一组命令。因此，差异仅在于返回值部分。

但是如果你想保持一个函数的干净，（只要看看函数式语言），就需要确保一个函数没有副作用。 >

Generally speaking, we all hear about the functions or procedures in programming languages. However, I just found out that I use these terms almost interchangeably (which is probably very wrong).

So, my question is:

What is the difference in terms of their functionality, their purpose and use?

An example would be appreciated.

解决方案

A function returns a value and a procedure just executes commands.

The name function comes from math. It is used to calculate a value based on input.

A procedure is a set of command which can be executed in order.

In most programming languages, even functions can have a set of commands. Hence the difference is only in the returning a value part.

But if you like to keep a function clean, (just look at functional languages), you need to make sure a function does not have a side effect.

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