确定两个不同字符串中的前n个字符是否相同的递归函数

def are_first_n_chars_same(str1, str2, n):
    # Base case: if n is 0, return True
    if n == 0:
        return True
    # If the first characters of both strings match and n is greater than 0
    if str1[0] == str2[0] and n > 0:
        # Recursively check the next character
        return are_first_n_chars_same(str1[1:], str2[1:], n - 1)
    else:
        return False

# Example usage:
str1 = "hello"
str2 = "hell"
n = 4
print(are_first_n_chars_same(str1, str2, n))  # Output: True