;Task:
Find the greatest common divisor &nbsp; ('''GCD''') &nbsp; of two integers.


''Greatest common divisor'' &nbsp; is also known as &nbsp; ''greatest common factor'' '''(gcf)''' &nbsp; and &nbsp; ''greatest common measure''.



;Related task:
:* &nbsp; [https://rosettacode.org/wiki/Least_common_multiple least common multiple].


;See also:
:* &nbsp; MathWorld entry: &nbsp;        [http://mathworld.wolfram.com/GreatestCommonDivisor.html greatest common divisor].
:* &nbsp; Wikipedia entry: &nbsp; &nbsp; [[wp:Greatest_common_divisor|greatest common divisor]].
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