Name
CDec Function
Named Arguments
No
Syntax
CDec(expression
)
-
expression
(required; Numeric or String) The range is +/-79,228,162,514,264,337,593,543,950,335 for numbers with no decimal places. The range is +/-7.9228162514264337593543950335 for numbers with up to 28 decimal places. The smallest possible nonzero number is 0.0000000000000000000000000001.
Return Value
expression
cast as a Decimal type
Description
This function casts expression
as a
Decimal value.
Rules at a Glance
If the value of
expression
is outside the range of the Decimal data type, an overflow error is generated.expression
must evaluate to a numeric value; otherwise a type-mismatch error is generated. To prevent this, it can be tested beforehand with the IsNumeric function.
Example
Dim decMyNumber As Decimal If IsNumeric(sMyNumber) then decMyNumber = CDec(sMyNumber) End If
Programming Tips and Gotchas
The Decimal data type replaces the VB 6 Currency data type and is appropriate for very large, very small, or very high precision numbers.
Use IsNumeric to test whether
expression
evaluates to a number.When converting a string representation of a number to a numeric, you should use the data type conversion functions — such as CDec — instead of Val, because the data type conversion functions take account of the system’s regional settings. In particular, the CDec function recognizes the thousands separator if it is encountered in the string representation of a number. For example, if the user inputs the value 1,827,209.6654, ...
Get VB.NET Language in a Nutshell, Second Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.