16 lines
324 B
Ruby
16 lines
324 B
Ruby
module Math
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# Least common multiple of +m+ and +n+, computed by multiplying
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# +m+ and +n+ and dividing the product by the gcd of +m+ and +n+,
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# +nil+ for non-positive numbers.
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def self.lcm(m, n)
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m = Integer(m)
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n = Integer(n)
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if m <= 0 || n <= 0
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return nil
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end
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m / gcd(m, n) * n
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end
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end
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