C＃编译器字面量 [英] C# compiler number literals

问题描述

有没有人知道C＃编译器数字文字修饰符的完整列表？

Does anyone know the full list of C# compiler number literal modifiers?

默认声明'0'使它成为一个Int32，'0.0' '。我可以在结尾使用文字修饰符'f'，以确保某些东西被视为单一。例如像这样...

By default declaring '0' makes it an Int32 and '0.0' makes it a 'Double'. I can use the literal modifier 'f' at the end to ensure something is treated as a 'Single' instead. For example like this...

var x = 0;    // x is Int32
var y = 0f;   // y is Single

我可以使用的其他修饰符是什么？有一个强制为双精度，十进制，UInt32？我试图谷歌搜索这个，但找不到任何东西。也许我的术语是错误的，所以这就解释了为什么我来了空白。任何帮助非常感激。

What are the other modifiers I can use? Is there one for forcing to Double, Decimal, UInt32? I tried googling for this but could not find anything. Maybe my terminology is wrong and so that explains why I am coming up blank. Any help much appreciated.

推荐答案

var y = 0f; // y is single
var z = 0d; // z is double
var r = 0m; // r is decimal
var i = 0U; // i is unsigned int
var j = 0L; // j is long (note capital L for clarity)
var k = 0UL; // k is unsigned long (note capital L for clarity)

从 C＃规范 2.4.4.2整数文字和2.4.4.3实数文字。请注意，根据 Jon Skeet 的建议，为了清晰起见，L和UL是首选，而不是小写形式。

From the C# specification 2.4.4.2 Integer literals and 2.4.4.3 Real literals. Take note that L and UL are preferred as opposed to their lowercase variants for clarity as recommended by Jon Skeet.

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