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Add List The Running Ruby Version as a ruby til

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jbranchaud
2021-02-06 18:58:34 -06:00
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# List The Running Ruby Version
The running Ruby version can be listed with the `RUBY_VERSION` constant.
For instance, if my Ruby version is 3.0.0, then I could get the version like
so:
```ruby
> RUBY_VERSION
=> "3.0.0"
```
This is nice if you just want to check in an IRB session or if you need it as
part of a script.
[source](https://blog.arkency.com/which-ruby-version-am-i-using-how-to-check/)