# Implementing the Euclidean Algorithm # is simple in python. # # Euclid's algorithm is used to efficiently # find two numbers greatest common divisor (GCD) # Division based Euclidean algorithm def gcd(a,b): while b != 0: temp = b b = a%b a = temp return a # Recursive based Euclidean algorithm def recursiveGCD(a,b): if b==0: return a else: return recursiveGCD(b, a%b) # just to prove they both work the same: def findGCD(a,b): divisionStyle = gcd(a,b) recursiveStyle = recursiveGCD(a,b) if divisionStyle != recursiveStyle: return "Fail...GCDs differ" else: return divisionStyle print findGCD(1071, 462) print findGCD(5, 10) print findGCD(5214, 24324) # my output: # 21 # 5 # 6
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Monday, April 12, 2010
Python - Finding GCD with Euclids Algorithm
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