Detect Capital

class Solution { func detectCapitalUse(_ word: String) -> Bool { let wordLength = word.length var count = 0 for letter in word { if (letter >= "A" && letter <= "Z") { count += 1 } } switch count { case 0: return (true) case 1: if (word[word.startIndex] >= "A" && word[word.startIndex] <= "Z") { return (true) } return (false) case wordLength: return (true) default: return (false) } } }

//다른 사람 풀이 class Solution { func detectCapitalUse(_ word: String) -> Bool { var count = 0 for ch in word where ch.isUppercase { count += 1 } switch count { case 0, word.count: return true case 1: return word.first!.isUppercase default: return false } } }