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Palindrome Function Coding

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Your question is Palindrome Function Coding. Start with the requirements on the right.

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Problem

As part of validating text inputs used in Doit International QA workflows, determine whether a given string is a palindrome. A palindrome reads the same from left to right and right to left. Treat uppercase and lowercase letters as different characters, and do not ignore spaces, punctuation, or other symbols.

Return True when the complete string is a palindrome; otherwise, return False.

Formal Specification

Implement is_palindrome(s), where s is a string and the return value is a Boolean. Compare characters from both ends toward the center. The function must not modify the input string.

Constraints

  • 0 <= len(s) <= 10^5
  • s contains printable ASCII characters
  • An empty string is considered a palindrome
  • The input string must not be modified

Function Signature

def is_palindrome(s):
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