Val

Converts a string to a floating point number

Syntax
   Declare Function Val ( ByRef str As Const String ) As Double
   Declare Function Val ( ByRef str As Const WString ) As Double

Usage
   result = Val( strnum )

Parameters
   strnum
      the string containing a number to convert

Return Value
   Returns a converted Double precision number

   If the first character of the string is invalid, Val will return 0.

Description
   Val("10") will return 10.0, and Val("10.10") will return 10.1. The 
   function parses the string from the left, skipping any white space, and 
   returns the longest number it can read, stopping at the first 
   non-suitable character it finds.  Scientific notation is recognized, 
   with "D" or "E" used to specify the exponent.

   Val can be used to convert integer numbers in binary / octal / 
   hexadecimal format, if they have the relevant identifier ("&B" / "&O" / 
   "&H") prefixed, for example: Val("&HFF") returns 255.

   Note:
   If you want to get an integer value from a string, consider using ValInt 
   or ValLng instead.  They are faster, since they don't use floating-point 
   numbers, and only ValLng provides full 64-bit precision for LongInt 
   types.

   If you want to convert a number into string format, use the Str 
   function.

Example
   Dim a As String, b As Double
   a = "2.1E+30xa211"
   b = Val(a)
   Print a, b


   2.1E+30xa211   2.1e+030

Differences from QB
   * None

See also
   * CDbl
   * ValInt
   * ValUInt
   * ValLng
   * ValULng
   * Str
   * Chr
   * Asc

