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python/snippets/gcd.md

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+---
+title: Greatest common divisor
+type: snippet
+tags: [math]
+cover: digital-nomad-12
+dateModified: 2020-09-15T16:13:06+03:00
+---
+
+Calculates the greatest common divisor of a list of numbers.
+
+- Use `functools.reduce()` and `math.gcd()` over the given list.
+
+```py
+from functools import reduce
+from math import gcd as _gcd
+
+def gcd(numbers):
+  return reduce(_gcd, numbers)
+```
+
+```py
+gcd([8, 36, 28]) # 4
+```