According to this documentation:
http://ruby-doc.org/core-2.1.2/Float.html#method-i-round
How do you explain?
2.1.2 :011 > 15.round(-1) => 20
According to this documentation:
http://ruby-doc.org/core-2.1.2/Float.html#method-i-round
How do you explain?
2.1.2 :011 > 15.round(-1) => 20