csharp.md

title	description
Floating-point cheat sheet for C#	Tips for using floating-point and decimal numbers in C#

Floating-Point Types

C# has IEEE 754 single and double precision types supported by keywords:

	float f = 0.1f; // 32 bit float, note f suffix
	double d = 0.1d; // 64 bit float, suffix optional

Decimal Types

C# has a 128 bit limited-precision decimal type denoted by the keyword decimal:

	decimal myMoney = 300.1m; // note m suffix on the literal

How to Round

The Math.Round() method works with the double and decimal types, and allows you to specify a rounding mode:

	Math.Round(1.25m, 1, MidpointRounding.AwayFromZero); // returns 1.3

Resources

• C# Reference
  • float type
  • double type
  • decimal type
  • Math.Round()

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title: 为 C# 准备的浮点小抄 description: Tips for using floating-point and decimal numbers in C#

Floating-Point Types

C# 用关键字来支持 IEEE 754 的单精度和双精度类型：

	float f = 0.1f; // 32 bit float, note f suffix
	double d = 0.1d; // 64 bit float, suffix optional

小数类型

C# 用关键字 decimal 来支持 128 位 limited-precision 小数类型：

	decimal myMoney = 300.1m; // note m suffix on the literal

如何取整

Math.Round() 方法与双精度和小数类型一直工作，现时也允许使用特定的 取整模式：

	Math.Round(1.25m, 1, MidpointRounding.AwayFromZero); // returns 1.3

资源

• C# 参考
  • 浮点类型
  • 双精度类型
  • 小数类型
  • Math.Round()