Dart语言：流程控制语句

Posted 2021-04-24 考拉的日常

if语句

void main(){ //if语句 int score = 90; if(score > 90){ print('优秀'); }else if(score > 60){ print('良好'); }else if( score == 60){ print('几个'); }else{ print('不及格'); }}

for循环

void main() { var list = [1, 2, 3, 4, 5, 6]; for (var index = 0; index < list.length; index++) { print(list[index]); } print('----------------------------------------'); for(var item in list){ print(item); }}

while语句

void main(){ //while语句 int count = 0; while(count < 5){ print(count ++); }
 print('count: $count'); print('--------------------------------'); do{ count--; }while(count > 0 && count < 5); print('count $count');}

break and continue

void main(){ var list = [1,2,3]; for(var item in list){ if(item ==2){ break;//终止循环 } print(item); } print('-------------------'); for(var item in list){ if(item ==2){ continue;//跳出当前循环 进入下一个循环 } print(item); }}

switch case语句

void main(){ int score = 90; switch(score){ case 30: print('不及格'); break; case 60: print('及格'); break; case 90: print('优秀'); break; default: print('^_^'); break; }}