Dart语言含有如下 63 个关键字，Go语言25个关键字，关键字个数比Go多很多，从关键字的数量方面讲，在语言语法层面的学习难度比Go要大些。

行号 关键字 关键字 关键字 关键字
1 abstract else import show
2 as enum in static
3 assert export interface super
4 async extends is switch
5 await extension late sync
6 break external library this
7 case factory mixin throw
8 catch false new true
9 class final null try
10 const finally on typedef
11 continue for operator var
12 covariant Function part void
13 default get required while
14 deferred hide rethrow with
15 do if return yield
16 dynamic implements set