48 lines
1.2 KiB
Markdown
48 lines
1.2 KiB
Markdown
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---
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title: Ruby Comments
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localeTitle: Ruby评论
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---
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# Ruby评论
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注释是代码中的注释行，在运行时被忽略（这意味着它们在源代码中可见但在运行程序时不会打印出来）。
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在Ruby中，单行注释以`#`字符开头并延伸到行尾。评论可以是自己的行或代码。
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```Ruby
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puts "Learning to code is fun!"
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# I am a single line comment.
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puts "Ruby is a great language!" # Me too - I am a trailing comment.
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```
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执行时，上面的程序产生以下内容：
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```
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Learning to code is fun!
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Ruby is a great language!
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```
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您可以通过在`=begin`和`=end`之间添加注释来执行多行注释。 `=begin`和`=end`必须从行的最开始开始， `=end`必须在它自己的一行上。
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```ruby
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=begin
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I am a multi-line comment
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and I can be as long as I please.
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See, still going!
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=end
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puts "Hello World!"
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=begin It's ok to start the comment on the same
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line as "=begin" (though it's more readable if
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you don't) but you can't put a space or any
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text before "=begin" or "=end" and you can't put
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anything on the same line after "=end".
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=end
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```
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执行时，上面的程序产生以下内容：
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```
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Hello World!
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```
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