Returns a value that indicates whether the specified value is not a number (double.NaN).
Syntax
[System.Runtime.ConstrainedExecution.ReliabilityContract(System.Runtime.ConstrainedExecution.Consistency.WillNotCorruptState, System.Runtime.ConstrainedExecution.Cer.Success)]
public static bool IsNaN (double d)
public static bool IsNaN (double d)
Parameters
- d
Returns
true if d evaluates to double.NaN; otherwise, false.
Remarks
Floating-point operations return double.NaN to signal that that result of the operation is undefined. For example, dividing 0.0 by 0.0 results in double.NaN.
Note:
double.IsNaN(double) returns false if a double value is either double.PositiveInfinity or double.NegativeInfinity. To test for these values, use the double.IsInfinity(double), double.IsPositiveInfinity(double), and double.IsNegativeInfinity(double) methods.
Requirements
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0