如何在Swift中使用循环构造英语字母表

// 构造小写字母表
var alphabetLowercase = ""
for scalar in Unicode.Scalar("a").value...Unicode.Scalar("z").value {
    if let scalarValue = Unicode.Scalar(scalar) {
        let character = Character(scalarValue)
        alphabetLowercase.append(character)
    }
}
print("小写字母表: \(alphabetLowercase)")

// 构造大写字母表
var alphabetUppercase = ""
for scalar in Unicode.Scalar("A").value...Unicode.Scalar("Z").value {
    if let scalarValue = Unicode.Scalar(scalar) {
        let character = Character(scalarValue)
        alphabetUppercase.append(character)
    }
}
print("大写字母表: \(alphabetUppercase)")