[LC] 520. Detect Capital
Given a word, you need to judge whether the usage of capitals in it is right or not.
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".
Otherwise, we define that this word doesn't use capitals in a right way.
Example 1:
Input: "USA"
Output: True
Example 2:
Input: "FlaG"
Output: False
Note: The input will be a non-empty word consisting of uppercase and lowercase latin letters.
class Solution {
public boolean detectCapitalUse(String word) {
int numCap = 0;
int i = 0;
while (i < word.length()) {
if (Character.isUpperCase(word.charAt(i))) {
numCap += 1;
}
i += 1;
}
if (Character.isUpperCase(word.charAt(0))) {
return numCap == 1 || numCap == word.length();
}
return numCap == 0;
}
}
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