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sqrt

sqrt(a)

Class Public methods

Computes the square root of a. It makes use of Complex and Rational to have no rounding errors if possible.

Math.sqrt(4/9)      # => 2/3
Math.sqrt(- 4/9)    # => Complex(0, 2/3)
Math.sqrt(4.0/9.0)  # => 0.666666666666667

Links:

https://github.com/ruby/ruby/blob/ca9654114920982b7603e28d6e8d808df77f1795/lib/mathn.rb#L226

doc_ruby_on_rails

2015-04-18 02:36:33

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