[LeetCode]#520. Detect Capital

Environment: Python 3.7

Key technique: .isupper, islower, slice

Example 1:

Input: "USA"
Output: True

Example 2:

Input: "FlaG"
Output: False

Analysis:

There are three rules in this problem.

1. All letters in this word are capitals, like “USA”.
2. All letters in this word are not capitals, like “leetcode”.
3. Only the first letter in this word is capital, like “Google

Solution:

class Solution:
    def detectCapitalUse(self, word: str) -> bool:
        if word.isupper()==True:
            return True
        elif word.islower()==True:
            return True
        elif word[0].isupper() and word[1:].islower() ==True:
            return True
        else:
            return False

Submitted result: