if else
int a = 2;
int b = 3;
if (a < b) {
print("$a is smaller");
} else {
print("$b is smaller");
}
三元运算符
a > b ? print('a大于b') : print('a小于b');
??表达式
String name = "test";
String nameToPrint = name ?? '[email protected]';
print(nameToPrint);
switch 语句
String grade = 'A';
switch (grade) {
case 'A':
print('very good');
break;
case 'B':
print('b');
break;
default:
print('其他');
}