Rounds the float with the specified precision.
x = 1.337 x.round # => 1 x.round(1) # => 1.3 x.round(2) # => 1.34
# File 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