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I have one beginner question for Ruby. I have been practicing Ruby with Chris Pine book and I see that he sometimes uses ' ' and sometimes " " after puts method.

Now, I have realized that I cant put any variable with # { } if I use ' ' since I have tried that , and also, if I use for example " " I don't have to discount ' with backslash like this \' (and other way around) but other than that I don't know are there any major differences between these to things or in other words should I sometimes use exclusively ' ' and sometimes " " ?

Tnx

SrdjaNo1
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  • I'd recommend reading "[How To Ask Questions The Smart Way](http://catb.org/esr/faqs/smart-questions.html)". We don't care if you're new, we expect you to do your research, to try, and to show what you tried in a concise, well-asked question. Jon Skeet's "[Writing the perfect question](https://codeblog.jonskeet.uk/2010/08/29/writing-the-perfect-question/)" and "[How much research effort is expected of Stack Overflow users?](http://meta.stackoverflow.com/questions/261592)" will help you also. – the Tin Man Jun 04 '17 at 18:18
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    Ok sorry, it was a language barrier. I was trying to search with signs "" and '', forgot it was called single/double quotes. – SrdjaNo1 Jun 04 '17 at 18:36

1 Answers1

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There are two differences:

  1. String interpolation: Double quotes allow it, single quotes won't.

    For example:

    name = "SrdjaNo1"

puts "Hi #{name}!"
#=> Hi SrdjaNo1!

puts 'Hi #{name}!'
#=> Hi #{name}!

  2. Escaping sequences: Single quotes will print them as text.

    For example:

    puts "Hello \nworld!"
#=> Hello
#=> world!

puts 'Hello \nworld!'
#=> Hello \nworld!

Other than that, you could use any of them, just be consistent with its use throughout your code.

the Tin Man
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Gerry
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