Single.NaN Field

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Represents not a number (NaN). This field is constant.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

Syntax

Public Const NaN As Single
public const float NaN

Remarks

The value of this constant is the result of dividing zero by zero.

This constant is returned when the result of an operation is undefined.

Use IsNaN to determine whether a value is not a number. It is not possible to determine whether a value is not a number by comparing it to another value equal to NaN.

Examples

The following code example demonstrates the NaN constant.

Dim zero As Single = 0

' This condition will return false.
If (0 / zero) = Single.NaN Then
   outputBlock.Text &= "0 / 0 can be tested with Single.NaN." & vbCrLf
Else
   outputBlock.Text &= "0 / 0 cannot be tested with Single.NaN; use Single.IsNan() instead." & vbCrLf
End If
Single zero = 0;

// This condition will return false.
if ((0 / zero) == Single.NaN)
{
   outputBlock.Text += "0 / 0 can be tested with Single.NaN." + "\n";
}
else
{
   outputBlock.Text += "0 / 0 cannot be tested with Single.NaN; use Single.IsNan() instead." + "\n";
}

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Platforms

Windows Phone

See Also

Reference

Single Structure

System Namespace

IsNaN