mirror of
https://github.com/TheAlgorithms/Ruby
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26 lines
523 B
Ruby
26 lines
523 B
Ruby
# frozen_string_literal: true
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# Calculates the square root of a number
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class SquareRoot
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class << self
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EPSILON = 1E-10
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def call(number)
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raise DomainError, 'Cannot find square root of negative number' if number.negative?
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return 0 if number.zero?
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find_root(number)
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end
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private
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def find_root(x0, xn = x0)
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xn1 = xn - ((xn * xn - x0) / (2.0 * xn))
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return xn1 if (xn1 - xn).abs <= EPSILON
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find_root(x0, xn1)
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end
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end
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end
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class DomainError < StandardError; end
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