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Oct 27, 2019
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Some grammatical and spelling corrections #1475

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8 changes: 4 additions & 4 deletions maths/collatz_sequence.py
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Original file line number Diff line number Diff line change
@@ -1,16 +1,16 @@
def collatz_sequence(n):
"""
Collatz conjecture: start with any positive integer n.Next termis obtained from the previous term as follows:
if the previous term is even, the next term is one half the previous term.
Collatz conjecture: start with any positive integer n.Next term is obtained from the previous term as follows:
if the previous term is even, the next term is one half of the previous term.
If the previous term is odd, the next term is 3 times the previous term plus 1.
The conjecture states the sequence will always reach 1 regaardess of starting n.
The conjecture states the sequence will always reach 1 regaardless of starting value n.
Example:
>>> collatz_sequence(43)
[43, 130, 65, 196, 98, 49, 148, 74, 37, 112, 56, 28, 14, 7, 22, 11, 34, 17, 52, 26, 13, 40, 20, 10, 5, 16, 8, 4, 2, 1]
"""
sequence = [n]
while n != 1:
if n % 2 == 0: # even
if n % 2 == 0: # even number condition
n //= 2
else:
n = 3 * n + 1
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