1019. Is it a palindrome?

Write a function that checks if a given string (case insensitive) is a palindrome.

Solution:

def is_palindrome(s):
    target = s.lower()
    for i in range(len(target)//2):
        if target[i] != target[-i-1]:
            return False
    return True

def is_palindrome(s):
    s = s.lower()
    return s == s[::-1]