// Dart语言解析 - parse void main() { print(num.parse('12')); print(num.parse('10.91'));

void main() { int num1 = 10; // declare an integer double num2 = 10.50; // declare a double value print(num1);

void main() { var grade = "A"; switch(grade) { case "A": {print("Excellent"); }

void main() { var num = 2; if(num > 0) { print("${num} is positive"); } else if(num < 0) {

void main() { var num = 12; if (num % 2==0) { print("Even"); } else { print("Odd");

// Dart语言if语句 void main() { varnum=5; if (num>0) { print("number is positive"); }

void main() { outerloop: // This is the label name for (var i = 0; i < 3; i++) { print("Outerloop:${i}");

void main() { outerloop: // This is the label name for (var i = 0; i < 5; i++) { print("Innerloop: ${i}");

void main() { var num = 0; var count = 0; for(num = 0;num<=20;num++) { if (num % 2==0) { continue;

// Dart语言break语句 void main() { var i = 1; while(i<=10) { if (i % 5 == 0) { print("The first multiple of 5between 1 and 10 is : ${i}");

// Dart语言do...while循环 void main() { var n = 10; do { print(n); n--; } while(n>=0); }

void main() { var num = 5; var factorial = 1; while(num >=1) { factorial = factorial * num; num--;

void main() { for(var temp, i = 0, j = 1; j<30; temp = i, i = j, j = i + temp) { print('${j}');

void main() { var str = 'abc'; if(str) { print('String is not empty'); } else { print('Empty String');

// Dart语言声明布尔变量 void main() { bool test; test=12 > 5; print(test); }

// Dart语言字符串codeUnitAt()方法 void main() { var res = "Good Day"; print("Code Unit of index 0 (G): ${res.codeUnitAt(0)}");