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
}