using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { /* for (int i = 1; i <= 100; i++) { Console.WriteLine("hello"+i); if (i == 40) { break;//终止离它最近的循环,跳出整个循环 } }*/ /*while (true) { string s=Console.ReadLine(); try//尝试,保护起来,即使程序也能执行出错 { int a = int.Parse(s); Console.WriteLine(a); } catch (Exception b)//捕获错误,有错误才执行 { Console.WriteLine(b); } finally//不管有没有错最后都执行 { Console.WriteLine("hello"); } }*/ } } }