注释是Ruby代码中的注释行,在运行时会被忽略。一行注释以#字符开头,它们从#延伸到该行的末尾,如下所示-

#!/usr/bin/ruby -w
# This is a single line comment.

puts "Hello, Ruby!"

执行后,上述程序会产生以下输出-

无涯教程网

链接:https://www.learnfk.com/ruby/ruby-comments.html

来源:LearnFk无涯教程网

Hello, Ruby!

Ruby多行注释

您可以使用=begin=end 语法注释多行,如下所示-

#!/usr/bin/ruby -w

puts "Hello, Ruby!"

=begin
This is a multiline comment and con spwan as many lines as you
like. But =begin and =end should come in the first line only. 
=end

执行后,上述程序会产生以下输出-

无涯教程网

链接:https://www.learnfk.com/ruby/ruby-comments.html

来源:LearnFk无涯教程网

Hello, Ruby!

确保尾随注释与代码之间的距离足够远,并且易于区分。如-

@counter      # keeps track times page has been hit
@siteCounter  # keeps track of times all pages have been hit

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