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Convert.ToBoolean Method (Double)

.NET Framework 2.0

Converts the value of the specified double-precision floating point number to an equivalent Boolean value.

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

Syntax

```public static bool ToBoolean (
double value
)
```
```public static boolean ToBoolean (
double value
)
```
```public static function ToBoolean (
value : double
) : boolean
```

Parameters

value

A double-precision floating point number.

Return Value

true if value is not zero; otherwise, false.

Example

The following code sample illustrates the use of the ToBoolean method, taking a Double as a parameter.

```public void ConvertDoubleBool(double doubleVal) {
bool    boolVal;
// Double to bool conversion cannot overflow.
boolVal = System.Convert.ToBoolean(doubleVal);
System.Console.WriteLine("{0} as a Boolean is: {1}.",
doubleVal, boolVal);

// bool to double conversion cannot overflow.
doubleVal = System.Convert.ToDouble(boolVal);
System.Console.WriteLine("{0} as a double is: {1}.",
boolVal, doubleVal);
}

```
```public void ConvertDoubleBool(double doubleVal)
{
boolean boolVal;

// Double to bool conversion cannot overflow.
boolVal = System.Convert.ToBoolean(doubleVal);
System.Console.WriteLine("{0} as a Boolean is: {1}.",
System.Convert.ToString(doubleVal),
System.Convert.ToString(boolVal));

// bool to double conversion cannot overflow.
doubleVal = System.Convert.ToDouble(boolVal);
System.Console.WriteLine("{0} as a double is: {1}.",
System.Convert.ToString(boolVal),
System.Convert.ToString(doubleVal));
} //ConvertDoubleBool

```

Platforms

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

Version Information

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0