在C＃中， MathF.Sign(Single)是MathF类方法，该方法返回一个整数，该整数指定数字的符号。
Syntax: public static int Sign (float x);
Here, x is the required single precision floating-point number whose sign has to be calculated.
返回类型：该方法根据以下条件返回System.Int32类型的值：
| Return Value | Condition: |
|---|---|
| 0 | If value is equal to zero |
| 1 | If value is greater than zero |
| -1 | If value is lesser than zero |
例子：
// C# program to demonstrate the
// MathF.Sign(Single) Method
using System;
class GFG {
// Main Method
static void Main(string[] args)
{
// float data type
float f1 = 746.89f;
float f2 = -782.1247f;
// displaying result
Console.WriteLine(check(MathF.Sign(f1)));
Console.WriteLine(check(MathF.Sign(f2)));
}
// function to check whether the input
// number is greater than zero or not
public static String check(int r)
{
if (r == 0)
return "Equal to zero";
else if (r < 0)
return "Less than zero";
else
return "Greater than zero";
}
}
输出：
Greater than zero
Less than zero