Dart《三》数据类型

字符串类型

void main() {
  String stri1 = "hello world";
  String stri2 = 'hello world';

print(stri2);
print(stri1);
print(stri2+stri1);

}

布尔类型

bool isA = true;
bool isB = false;

print(isA);
print(isB);

${} 连接

print("${stri2+stri1}");

字典：Map,键值对

var dic = {"key":"value","ke2":true};
print(dic);

var dicConst = const {"key1":"value1","key2":"value2"};
print(dicConst);

神奇的简写：下面两个居然是等价的

flybyObjects.forEach((element) {
    print(element);
  });
  flybyObjects.forEach(print);