Use this global constant:
RUBY_VERSION
Other relevant global constants include:
RUBY_PATCHLEVEL
RUBY_PLATFORM
RUBY_RELEASE_DATE
Usage example via irb
session:
irb(main):001:0> RUBY_VERSION
=> "1.8.7"
Use this global constant:
RUBY_VERSION
Other relevant global constants include:
RUBY_PATCHLEVEL
RUBY_PLATFORM
RUBY_RELEASE_DATE
Usage example via irb
session:
irb(main):001:0> RUBY_VERSION
=> "1.8.7"