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CDbl Function


This standard VB function converts an expression to the data type double.

Syntax

CDbl(expression)

Argument
Description

expression

Any expression that evaluates to a number

Returns

The value of expression as a double-precision number.

Usage

CDbl accepts any type of expression. Strings that cannot be converted to a double-precision floating point result in a Type Mismatch error. Variants containing null result in an Illegal Use of Null error.

Example

This example calculates the square root of 2 as a double-precision floating-point value and displays it in scientific notation.

Sub Button_Click
Dim value
   Dim msgtext
   value = CDbl(Sqr(2))
   msgtext = "The square root of 2 is: " & Value
End Sub

Related Topics

CCur Function
CInt Function
CLng Function
CSng Function
CStr Function
CVar Function
CVDate Function

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