Represents not a number (NaN). This field is constant.
Assembly: mscorlib (in mscorlib.dll)
A method or operator returns when the result of an operation is undefined. For example, the result of dividing zero by zero is , as the following example shows. (But note that dividing a non-zero number by zero returns either PositiveInfinity or NegativeInfinity, depending on the sign of the divisor.)
In addition, a method call with a value or an operation on a value returns , as the following example shows.
Use the IsNaN method to determine whether a value is not a number. Two values are considered unequal to one another. Therefore, it is not possible to determine whether a value is not a number by using the equality operator to compare it to another value that is equal to NaN. The comparison returns false, as the following example shows.
The following code example demonstrates the constant.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.