我可以在 C# 中声明带有千位分隔符的常量整数吗?

Can I declare constant integers with a thousands separator in C#?(我可以在 C# 中声明带有千位分隔符的常量整数吗?)

问题描述

Cobra 编程语言有一个有用的功能，您可以在数字文字中使用下划线来提高可读性.例如，以下是等价的，但第二行更容易阅读:

The Cobra programming language has a useful feature where you can use underscores in numeric literals to improve readability. For example, the following are equivalent, but the second line is easier to read:

x = 1000000
x = 1_000_000  # obviously 1 million

C# 有什么等价的吗?

Is there anything equivalent for C#?

推荐答案

从 C# 7 开始回答

是的，这在 C# 7 中受支持.但请注意，没有验证您已将下划线放在正确的位置:

Yes, this is supported in C# 7. But be aware that there's no validation that you've put the underscores in the right place:

// At a glance, this may look like a billion, but we accidentally missed a 0.
int x = 1_00_000_000;

2011 年的回答

不，C# 中没有类似的东西.你可以这样做:

No, there's nothing like that in C#. You could do:

const int x = 1000 * 1000;

但这已经是最好的了.

(请注意，此增强功能已进入 Java7 也是……也许有一天它会在 C# 中引入.)

(Note that this enhancement went into Java 7 as well... maybe one day it will be introduced in C#.)

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