Erlang 与 VM 入门
探索 Erlang 虚拟机（BEAM）、基础语法、数据类型以及 Erlang 开发所需的函数式编程思维。
Erlang 与 VM 入门 是 CoddyKit 上的免费 Erlang OTP: Distributed & Fault-Tolerant Systems Programming 课时。 这是第 1 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 Erlang OTP: Distributed & Fault-Tolerant Systems Programming 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Erlang OTP: Distributed & Fault-Tolerant Systems Programming 课程共包含 4 节课。
本课时的部分内容尚未翻译，以英文显示。
Meet Erlang: Built for Reliability
Erlang, built by Ericsson for systems that must never go down, is a functional language for fault-tolerant, concurrent, distributed apps.
The Power of BEAM
Erlang runs on the BEAM virtual machine, which manages millions of lightweight processes — the foundation of its concurrency and fault tolerance.
Your First Erlang Code
Time for Hello World. Erlang code lives in modules (.erl files) that declare a name and export functions by name and arity.
-module(hello_world).
-export([start/0]).
start() ->
io:format("Hello, Erlang!~n").The Erlang Shell: Your Playground
The Erlang shell (start it with erl) lets you type expressions and see results instantly. Remember to end each with a dot.
Variables: Single Assignment
Erlang variables start uppercase and use single assignment: once bound, a value cannot change in scope. That immutability prevents whole bug classes.
-module(variables).
-export([show/0]).
show() ->
X = 10,
Y = X * 2,
io:format("X is: ~w~n", [X]),
io:format("Y is: ~w~n", [Y]).Basic Types: Atoms & More
Core types: atoms (lowercase named constants like ok), numbers (integers and floats), and booleans, which are just the atoms true and false.
-module(basic_types).
-export([display/0]).
display() ->
Status = ok,
Count = 42,
Pi = 3.14159,
IsActive = true,
io:format("Status: ~w~n", [Status]),
io:format("Count: ~w~n", [Count]),
io:format("Pi: ~w~n", [Pi]),
io:format("Is Active: ~w~n", [IsActive]).Tuples: Fixed Collections
A tuple groups a fixed set of elements in curly braces, like {ok, Value}. It is immutable — build a new one to "change" it.
-module(tuples).
-export([show/0]).
show() ->
Person = {person, "Alice", 30, female},
Coordinate = {x, 10, y, 20},
io:format("Person: ~w~n", [Person]),
io:format("Coordinate: ~w~n", [Coordinate]).Lists: Flexible Sequences
A list in square brackets holds any number of ordered elements. You process it recursively as a Head (first item) and Tail (the rest).
-module(lists_example).
-export([show/0]).
show() ->
Numbers = [1, 2, 3, 4, 5],
Colors = [red, green, blue],
MixedList = [atom_name, 123, {tuple, 1}],
io:format("Numbers: ~w~n", [Numbers]),
io:format("Colors: ~w~n", [Colors]),
io:format("Mixed: ~w~n", [MixedList]).Thinking Functionally
Erlang is functional: data is immutable, functions avoid side effects, and functions are first-class values you pass around freely.
Quick Check: Erlang Basics
Let's test your understanding of basic Erlang concepts.
Which of the following statements about Erlang's core features are TRUE?
Recap: Erlang Basics
Recap: Erlang targets fault-tolerant concurrency on the BEAM, with modules, single-assignment variables, and core types like atoms, tuples, and lists.
用 AI 导师学习 Erlang — 免费
在浏览器中编写并运行真实代码，获得全天候 AI 导师的即时帮助，并在网页或应用中继续学习。
- 课程
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- 课程
- 48
常见问题解答
「Erlang 与 VM 入门」课时是免费的吗？
是的 — 「Erlang 与 VM 入门」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Erlang OTP: Distributed & Fault-Tolerant Systems Programming 课程的其余内容，请升级到 CoddyKit PRO。 Erlang OTP: Distributed & Fault-Tolerant Systems Programming 课程共包含 4 节课。
「Erlang 与 VM 入门」这节课中我会学到什么？
探索 Erlang 虚拟机（BEAM）、基础语法、数据类型以及 Erlang 开发所需的函数式编程思维。 你通过在浏览器中直接运行的动手代码来练习 Erlang OTP: Distributed & Fault-Tolerant Systems Programming，全天候 AI 导师会在你学习这节课的过程中回答你的问题。
学习 Erlang OTP: Distributed & Fault-Tolerant Systems Programming 需要有经验吗？
无需任何先前经验。CoddyKit 上的 Erlang OTP: Distributed & Fault-Tolerant Systems Programming 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 1 节课，共 4 节。
「Erlang 与 VM 入门」课时需要多长时间？
大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。
我能在这节 Erlang OTP: Distributed & Fault-Tolerant Systems Programming 课中编写并运行代码吗？
能。每节 Erlang OTP: Distributed & Fault-Tolerant Systems Programming 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。
此课程中的所有课时
- Erlang 与 VM 入门
- Erlang 进程与消息传递
- 基本并发模式
- 模式匹配与守卫