dynamic 表示是动态的，数据类型是指任意类型 var a; a = 10; a = "Dart"; print(a); dynamic b = 20; b = "JavaScript"; print(b); print(b.runtimeType); var list = new List<dynamic>(); list.add(1); list.add("hello");
一、类型 数值型有 num，int, double num a = 10; a = 12.5; print(a); print(a.runtimeType); int b = 20; // b = 20.5; print(b); print(b.runtimeType); double c = 10.5; // c = 30; print(c); print(c.runtimeType); print("\n"); 其
通过runtimeType可以获取当前数据类型 var a = 10; var b = 10.0; var c = '10'; var d = true; var e = [12.5,13.1]; var f = {3:'5',5:'11'}; var t = new Test();// 这里就直接使用上面那个Test类 不再去重复写这个类了 print('a 的类型是： ${a.runtimeType}
