# 翻转字符串
# 推荐方式
# 切片
original_string = "hello"
reversed_string = original_string[::-1]
# print(reversed_string)

# 使用reversed 和 join结合


def reverse_with_list(text):
    char_list = list(text)
    char_list.reverse()
    return "".join(char_list)


original_string = "hello"

print(reverse_with_list(original_string))


# for循环
original_string = "hello"
reverse_string = ""
for char in original_string:
    reverse_string = char + reverse_string
print(reverse_string)


# 递归
def reverse_string_tail(s, result=""):
    if len(s) == 0:
        return result
    else:
        return reverse_string_tail(s[1:], s[0] + result)


text_string = "Python"
print(reverse_string_tail(text_string))

print("7" < "8")