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Convert.ToDouble Method (Int32)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Converts the value of the specified 32-bit signed integer to an equivalent double-precision floating point number.

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

Syntax

'Declaration
Public Shared Function ToDouble ( _
    value As Integer _
) As Double

public static double ToDouble(
    int value
)

Parameters

Return Value

Type: System.Double
A double-precision floating point number equivalent to the value of value.

Examples

The following code sample illustrates the conversion of an Int32 value to a Double one, using ToDouble.

Public Sub ConvertDoubleInt(ByVal doubleVal As Double)

   Dim intVal As Integer = 0
   ' Double to Integer conversion can overflow.
   Try
      intVal = System.Convert.ToInt32(doubleVal)
      outputBlock.Text &= String.Format("{0} as an Integer is: {1}", _
                                doubleVal, intVal) & vbCrLf
   Catch exception As System.OverflowException
      outputBlock.Text &= String.Format( _
          "Overflow in Double-to-Byte conversion.") & vbCrLf
   End Try

   ' Integer to Double conversion cannot overflow.
   doubleVal = System.Convert.ToDouble(intVal)
   outputBlock.Text &= String.Format("{0} as a Double is: {1}", _
                             intVal, doubleVal) & vbCrLf
End Sub

public void ConvertDoubleInt(double doubleVal)
{

   int intVal = 0;
   // Double to int conversion can overflow.
   try
   {
      intVal = System.Convert.ToInt32(doubleVal);
      outputBlock.Text += String.Format("{0} as an int is: {1}",
         doubleVal, intVal) + "\n";
   }
   catch (System.OverflowException)
   {
      outputBlock.Text += String.Format(
         "Overflow in double-to-int conversion.") + "\n";
   }

   // Int to double conversion cannot overflow.
   doubleVal = System.Convert.ToDouble(intVal);
   outputBlock.Text += String.Format("{0} as a double is: {1}",
      intVal, doubleVal) + "\n";
}

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.