Ruby行内注释的代码在运行时被忽略。单行注释#字符开始,他们从#到行末如下:
#!/usr/bin/ruby -w# This is a single line comment.puts "Hello, Ruby!"
上述程序执行时,会产生以下结果:
Hello, Ruby!
Ruby的多行注释
可以注释掉多行使用 =begin 和 =end 语法如下:
#!/usr/bin/ruby -wputs "Hello, Ruby!"=beginThis is a multiline comment and con spwan as many lines as youlike. But =begin and =end should come in the first line only. =end
上述程序执行时,会产生以下结果:
Hello, Ruby!
确保后面的注释是保持足够的距离的代码,能使它很容易区分。如果在一个块中存在一个以上的尾端注释它们对齐。例如:
@counter # keeps track times page has been hit@siteCounter # keeps track of times all pages have been hit
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