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pythoncountpalindrome

Palindrome chain length in Python coming up incorrect

I feel like this should work correctly but I get an error with the count being 1 less than it should be.

def palindrome_chain_length(n):
    count = 0
    while str(n) != str(n)[::-1] :
        n = n+n
        count += 1
    else:
        return count
Solution

  • If you just get count 1 less than you want, start with count = 1. And it seems to me that it should be: 

    n += int(str(n)[::-1])

    instead of:

    n = n + n

    (see comment @alfasin).