520. Detect Capital

Easy
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.

解題

func detectCapitalUse(word string) bool {
capital := 0
notCapital := 0
​
for i:=0; i<len(word); i++ {
if int(word[i]) >= 65 && int(word[i]) <= 90 { //大寫
if notCapital != 0 {
return false
}
​
capital++
} else {
if capital > 1 {
return false
}
notCapital++
}
}
​
return true
}