如何在C＃中生成0到1之间的随机数？ [英] How do I generate random number between 0 and 1 in C#?

问题描述

我想获得1到0之间的随机数。但是，我每次都得到0。有人可以向我解释为什么我总是得到0的原因吗？
这是我尝试过的代码。

I want to get the random number between 1 and 0. However, I'm getting 0 every single time. Can someone explain me the reason why I and getting 0 all the time? This is the code I have tried.

Random random = new Random();
int test = random.Next(0, 1);
Console.WriteLine(test);
Console.ReadKey();

推荐答案

根据文档，下一步返回介于（包括）的最小值和（最大值）：

According to the documentation, Next returns an integer random number between the (inclusive) minimum and the (exclusive) maximum:

返回值

一个32位有符号整数，大于或等于minValue且小于maxValue；也就是说，返回值的范围包括minValue但不包括maxValue。如果minValue等于maxValue，则返回minValue。

A 32-bit signed integer greater than or equal to minValue and less than maxValue; that is, the range of return values includes minValue but not maxValue. If minValue equals maxValue, minValue is returned.

唯一满足的整数

0 <= x < 1

是 0 ，因此您总是得到值 0 。换句话说， 0 是半封闭间隔 [0，1）内的唯一整数。

is 0, hence you always get the value 0. In other words, 0 is the only integer that is within the half-closed interval [0, 1).

因此，如果您实际上对整数值 0 或 1 ，然后使用 2 作为上限：

So, if you are actually interested in the integer values 0 or 1, then use 2 as upper bound:

var n = random.Next(0, 2);

如果您想获取0到1之间的小数，请尝试：

If instead you want to get a decimal between 0 and 1, try:

var n = random.NextDouble();

希望这会有所帮助：-）

Hope this helps :-)

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