recursion - Python Recursive Function to Check if Palindrome -

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• how test 1 variable against multiple values? 16 answers

i need define recursive function check if string palindrome.

below's code:

def palindrome_recur(string):      if len(string)==0 or 1:         return true     else:         if string[0] == string[-1]:             return palindrome_recur(string[1:-2])         else:             return false 

it passes few test cases, doesn't work string "chipmunks". can tell me might have overlooked?

the problem this:

if len(string)==0 or 1: 

that checks whether either of len(string) == 0, or 1 true. since 1 true, whole expression true , function returns true.

you should use

if len(string) <= 1: 

instead.

then, you'll find out problem indexing -2 other answers mention.