在C＃代码中分隔大数字的数字

Question

In C++ you can separate the digits for readability in your code with apostrophes:

int num = 1'000'000;

In Ruby, you can use underscores:

num = 1_000_000

Is there a similar syntax for C#? I tried a few different searches but only came up with results for outputting or reading numbers in a particular format.

Answer 1

As of the time this answer is written, that feature does not exist in C#. However, there is a feature request for it, and it looks like it will be part of C# 7, which is the upcoming version.

The feature request is listed on their C# 7 list of features , but you probably shouldn't assume 100% it will make it in. Things are subject to change.

Answer 2

This won't help with int, but with decimal you can use:

decimal num1 = 1E06M; // 1000000
decimal num2 = 1.23e06m; // 1230000

Answer 3

Small but handy little feature introduced in C# 7.0 is the digit separator character, which takes the form of a single underscore (_). This separator can be used within any numeric literal that means of improving legibility. Digit separator in a numeric literal does not change the value in anyway. Any given number is always the same to the common language run time, regardless of whether it uses separators or not.

// These two are equivalent.
var bigNumber      = 123456789012345678;
var bigNumberWithSplit = 123_456_789_012_345_678;

Answer 4

在此期间，您仍然可以这样做：

int num = Int32.Parse("1,000,000", NumberStyles.AllowThousands);