[01 Number类型](01%E6%95%B0%E6%8D%AE%E7%B1%BB%E5%9E%8B.md) [02 String 类型](02String%E7%B1%BB%E5%9E%8B.md) [03 Boolean类型](03Boolean%E7%B1%BB%E5%9E%8B.md) [04 Undefined和Null](04Undefined%E5%92%8CNull.md) [05 typeof 和 注释](05typeof%E5%92%8C%E6%B3%A8%E9%87%8A.md) [06 数据类型转换](06%E6%95%B0%E6%8D%AE%E7%B1%BB%E5%9E%8B%E8%BD%AC%E6%8D%A2.md)