Variable defined inside loop in Ruby

Question

Here is a while loop in Ruby

x = 0
while x < 1 do
   inside_var = "I'm inside"
   x += 1
end

puts inside_var

Although, inside_var is defined inside a while loop, it's visible outside of it. It's totally different from Java, C#, etc.

I wonder, did I miss something? Is it really how it works? Is it true for any kind of loop in Ruby?

Yes, that's how it works. Variables defined in a loop are scoped to the containing function. — Sergio Tulentsev
– Sergio Tulentsev, Commented Jan 6, 2013 at 13:44

sepp2k · Accepted Answer · 2013-01-06 13:44:31Z

6

Yes, it really is how it works. It applies to all built-in control structures (while, for, if, begin ... end), but not to blocks. So if you rewrite your code using each or times, it will behave like you expect.

answered Jan 6, 2013 at 13:44

sepp2k

372k56 gold badges687 silver badges687 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Variable defined inside loop in Ruby

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related