c#
1.HelloWorld
using System; //注释:引入命名空间
namespace _001
{
//Pragram类
class Pragram
{
//Main方法
static void Main()
{
// ctrl+k ctrl+c 组合键 注释
// ctrl+k ctrl+u 组合键 取消注释
Console.WriteLine("Hello World! 1 ");//输出语句
/*
多行注释
多行注释
*/
Console.WriteLine("Hello World! 2 ");
Console.WriteLine("Hello World! 你好! 3 ");
Console.Write("Hello World! 4 ");
Console.Write("Hello World! 5 ");
Console.Write("Hello World! 6 ");
Console.WriteLine("Hello " +
"World! ");
Console.WriteLine("Hello ");
Console.WriteLine("World ");
Console.WriteLine("He\tllo \nWorld! ");// 转义字符 \t制表符 \n换行符
Console.WriteLine("dsy说:\"Hello\" ");
}
}
}
