C# Double IsNaN

Description

Double IsNaN returns a value that indicates whether the specified value is not a number (NaN).

Syntax

Double.IsNaN has the following syntax.

public static bool IsNaN(
  double d
)

Parameters

Double.IsNaN has the following parameters.

• d - A double-precision floating-point number.

Returns

Double.IsNaN method returns true if d evaluates to NaN; otherwise, false.

Example

The following code example illustrates the use of IsNaN: Double.IsNan() can determine whether a value is not-a-number.

using System;//w w  w. j a v a 2  s .com

public class MainClass{
  public static void Main(String[] argv){  
    // This will return true. 
    int zero = 0;
    if (Double.IsNaN(0 / zero)) 
       Console.WriteLine("true");

  }
}

The code above generates the following result.