round(precision = nil) — Float — Ruby on Rails 3.2.22.5

round(precision = nil)

Rounds the float with the specified precision.

x = 1.337
x.round    # => 1
x.round(1) # => 1.3
x.round(2) # => 1.34

Parameters

precision opt = nil

Source

# File activesupport/lib/active_support/core_ext/float/rounding.rb, line 11
  def round(precision = nil)
    if precision
      magnitude = 10.0 ** precision
      (self * magnitude).round / magnitude
    else
      precisionless_round
    end
  end

Defined in activesupport/lib/active_support/core_ext/float/rounding.rb line 11 · View on GitHub · Improve this page · Find usages on GitHub

Defined in Float

Signature

Parameters