[2.2.1 命名规则](2.2.1%E5%91%BD%E5%90%8D%E8%A7%84%E5%88%99.md) [2.2.2 变量](2.2.2%E5%8F%98%E9%87%8F.md) [2.2.2 变量(补充:类型推断的好处)](2.2.2%E5%8F%98%E9%87%8F%E8%A1%A5%E5%85%85%E7%B1%BB%E5%9E%8B%E6%8E%A8%E6%96%AD%E7%9A%84%E5%A5%BD%E5%A4%84.md) [2.2.2 变量(补充:泛型)](2.2.2%E5%8F%98%E9%87%8F%E8%A1%A5%E5%85%85%E6%B3%9B%E5%9E%8B.md) [2.2.3 常量](2.2.3%E5%B8%B8%E9%87%8F.md) [2.2.4 iota](2.2.4iota.md) [2.2.5 Unicode字符编码](2.2.5Unicode%E5%AD%97%E7%AC%A6%E7%BC%96%E7%A0%81.md) [2.2.6 GBK 转 UTF8](2.2.6GBK%E8%BD%ACUTF8.md)