占位符的使用
1.占位符{}
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
static void Main() { double t = 10.12; Console.WriteLine("这是double数据类型{0}",t); Console.ReadKey(); }
2.控制输出小数点两位
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
static void Main() { double t = 10*1.0/3;//自动类型转换 Console.WriteLine("控制输出两位小数{0:0.00}",t); Console.ReadKey(); }
时间就像海绵里的水,只要你愿意挤,总还是有的——鲁迅