Single.IsNegativeInfinity() Method in C# with Examples

In C#, Single.IsNegativeInfinity(Single) is a Single struct method. This method is used to check whether a specified floating-point value evaluates to negative infinity or not. In some floating point operation, it is possible to obtain a result that is negative infinity. For Example: If any negative value is divided by zero, it results in negative infinity.

Syntax: public static bool IsNegativeInfinity (float f);
Parameter:
f: It is a single-precision floating-point number of type System.Single.

Return Type: This function return a boolean value True, if specified value evaluates to negative infinity, otherwise return False.

Example: To demonstrate the Single.IsNegativeInfinity(Single) Method:

// C# program to illustrate the
// Single.IsNegativeInfinity(Single)
// Method
using System;

class GFG {

    // Main method
    static public void Main()
    {

        // Dividing a negative number by zero
        // results in Negative infinity.

        // Dividing a number directly by 0
        // produces an error
        // So 0 is stored in a variable first

        float zero = 0.0f;
        float value = -5f;
        float result = value / zero;

        // Printing result
        Console.WriteLine(result);

        // Check result using IsNegativeInfinity() Method
        Console.WriteLine(Single.IsNegativeInfinity(result));

        // Result of floating point operation
        // that is less than Single.MinValue
        // is Negative Infinity

        result = Single.MinValue * 7.9f;

        // Printing result
        Console.WriteLine(result);

        // Check result using IsNegativeInfinity() Method
        Console.WriteLine(Single.IsNegativeInfinity(result));
    }
}

Output:

-Infinity
True
-Infinity
True

Note:

• The result of any floating point operation that is less than Single.MinValue is considered as Negative Infinity.
• Floating-point operation return PositiveInfinity or NegativeInfinity to indicate the overflow condition.

Reference:

• https://docs.microsoft.com/en-us/dotnet/api/system.single.isnegativeinfinity?view=netstandard-2.1