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20 lines
471 B
Python
20 lines
471 B
Python
def main():
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def n31(a):# a = initial number
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c = 0
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l = [a]
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while a != 1:
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if a % 2 == 0:#if even divide it by 2
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a = a // 2
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elif a % 2 == 1:#if odd 3n+1
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a = 3*a +1
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c += 1#counter
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l += [a]
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return l , c
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print(n31(43))
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print(n31(98)[0][-1])# = a
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print("It took {0} steps.".format(n31(13)[1]))#optional finish
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if __name__ == '__main__':
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main()
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