520. Detect Capital

class Solution:
    def detectCapitalUse(self, word: str) -> bool:
        cap_count = 0
        # finding number of UPPERCASE in given string
        for i in word:
            if i >='A' and i<= 'Z':
                cap_count += 1
                
        if cap_count == 0: # All lowercase
            return True
        if cap_count ==1 and word[0]>='A' and word[0]<='Z': # If only first letter is UPPERCASE
            return True
        if cap_count == len(word): # If all letters are uppercase
            return True
        return False
        
'''
        We define the usage of capitals in a word to be right when one of the following cases holds:

All letters in this word are capitals, like "USA".
All letters in this word are not capitals, like "leetcode".
Only the first letter in this word is capital, like "Google".
Given a string word, return true if the usage of capitals in it is right.

 

Example 1:

Input: word = "USA"
Output: true
Example 2:

Input: word = "FlaG"
Output: false
 

Constraints:

1 <= word.length <= 100
word consists of lowercase and uppercase English letters.
'''