CDbl Function


CDbl Function

Syntax

     Dim result As Double = CDbl(expression) 


expression (required; Numeric or String)

Any expression in the valid range of the Double data type

Description

The CDbl function converts expression to the Double data type.

Usage at a Glance

  • An expression that evaluates outside the valid range of the target data type results in a runtime error. Nonnumeric expressions also generate an error.

  • In most cases, the numeric conversion functions are a better choice than the Val function when converting a string, as the conversion functions take into account the system's regional settings. However, Val converts empty strings to zero without error.

  • Use IsNumeric to test whether expression evaluates to a number.

  • This function does not support named arguments.

Example

     Dim targetNumber As Double     If IsNumeric(stringNumber) Then        targetNumber = CDbl(stringNumber)     End If 

See Also

CSng Function, Val Function




Visual Basic 2005(c) In a Nutshell
Visual Basic 2005 in a Nutshell (In a Nutshell (OReilly))
ISBN: 059610152X
EAN: 2147483647
Year: 2004
Pages: 712

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