Double.IsRealNumber(Double) Method

Definition

Namespace:

System

Assembly:

System.Runtime.dll

Source:

Double.cs

Determines if a value represents a real number.

public:
 static bool IsRealNumber(double value) = System::Numerics::INumberBase<double>::IsRealNumber;

public static bool IsRealNumber (double value);

static member IsRealNumber : double -> bool

Public Shared Function IsRealNumber (value As Double) As Boolean

Parameters

value

Double

The value to be checked.

Returns

Boolean

true if value is a real number; otherwise, false.

Implements

IsRealNumber(TSelf)

Remarks

This function returns true for a complex number a + bi where b is zero.

This function checks values against the extended real number line, thus returns true for PositiveInfinity and NegativeInfinity.