# Double.IsNegativeInfinity() Method in C#

• Last Updated : 23 Aug, 2021

In C#, Double.IsNegativeInfinity() is a Double struct method. This method is used to check whether a specified 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 (double d);
Parameter:
d: It is a double-precision floating-point number of type System.Double

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

Example:

```Input  : d = -5.0 / 0.0
Output : True

Input  : d = -1.5935e250 * 7.948e110
Output : True```

Code: To demonstrate the Double.IsNegativeInfinity(Double) Method

## C#

 `// C# program to illustrate the``// Double.IsNegativeInfinity() 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` `        ``double` `zero = 0.0;``        ``double` `value = -5;``        ``double` `result = value / zero;` `        ``// Printing result``        ``Console.WriteLine(result);` `        ``// Check result using IsNegativeInfinity() Method``        ``Console.WriteLine(Double.IsNegativeInfinity(result));` `        ``// Result of floating point operation``        ``// that is less than Double.MinValue``        ``// is Negative Infinity` `        ``result = Double.MinValue * 7.948e110;` `        ``// Printing result``        ``Console.WriteLine(result);` `        ``// Check result using IsNegativeInfinity() Method``        ``Console.WriteLine(Double.IsNegativeInfinity(result));``    ``}``}`
Output:
```-Infinity
True
-Infinity
True```

Note:

• The result of any floating point operation is less than Double.MinValue (i.e -1.7976931348623157E+308 ) is considered as Negative Infinity.
• Floating-point operation return Infinity (Positive Infinity) or -Infinity (Negative Infinity) to indicate an overflow condition.

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