to_fib
to the nearest fibonacci number
Installation
Add this line to your application's Gemfile:
gem 'to_fib'And then execute:
$ bundle
Or install it yourself as:
$ gem install to_fib
And use it in irb:
$ irb -rto_fib
Usage
13.to_fib # 13
20.to_fib # 21
900000000000000000000000000000000000000000000000000000000000000000000.to_fib # 1082459262056433063877940200966638133809015267665311237542082678938909
-44.to_fib # -55
8.is_fib? # true
9.is_fib? # false