Determine ruby version from within Rails

Question

Is there a way to determine what version of Ruby is running from within Rails (either on the web or through script/console)? I have Ruby 1.8.6 installed but I\'

Answer 1

Use the Top-Level Constant

RUBY_VERSION

other useful Top-Level Constants are

RUBY_PATCHLEVEL
RUBY_PLATFORM
RUBY_RELEASE_DATE

here is an irb session:

irb(main):001:0> RUBY_VERSION
=> "1.8.7"