LeetCode||65. Valid Number

徐州牧

墨衍会员 · AI 创作全网分发码龄12年

关注

原创最新推荐文章于 2026-04-01 02:31:43 发布 315 阅读 AI 写同款· GEO 优化 ›

Leetcode 65 Valid Number DFA有限状态机用有限状态机DFA解决，将每一位看成一种状态转移条件，每次读取的一位，就根据转移矩阵进行状态转移，若转移到不合法的状态则返回false。阅读详情

Validate if a given string is numeric.

Some examples:
"0" => true
" 0.1 " => true
"abc" => false
"1 a" => false
"2e10" => true

Note: It is intended for the problem statement to be ambiguous. You should gather all requirements up front before implementing one.

Update (2015-02-10):
The signature of the C++ function had been updated. If you still see your function signature accepts a const char * argument, please click the reload button to reset your code definition.

不得不说，python自带的数据类型真是简单好用

class Solution(object):
    def isNumber(self, s):
        """
        :type s: str
        :rtype: bool
        """
        try:
            num = float(s)
        except:
            return False
        return True

收录于