ValLng
Converts a string to a long integer
Declare Function ValLng Overload ( ByRef strnum As Const String ) As LongInt
Declare Function ValLng ( ByVal strnum As Const WString Ptr ) As LongInt
result = ValLng ( strnum )
strnum
Returns a LongInt of the converted string
If the first character of the string is invalid, ValLng will return 0.
For example, ValLng("10") will return 10, and ValLng("10.60") will return 10 as well. 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. Any non-numeric characters, including decimal points and exponent specifiers, are considered non-suitable, for example, ValLng("23.1E+6") will just return 23.
ValLng can be used to convert integer numbers in Binary / Octal / Hexadecimal format, if they have the relevant identifier ("&B" / "&O" / "&H") prefixed, for example: ValLng("&HFF") returns 255.
If you want to convert a number into string format, use the Str function.
Syntax
Declare Function ValLng Overload ( ByRef strnum As Const String ) As LongInt
Declare Function ValLng ( ByVal strnum As Const WString Ptr ) As LongInt
Usage
result = ValLng ( strnum )
Parameters
strnum
the string to convert
Return Value
Returns a LongInt of the converted string
If the first character of the string is invalid, ValLng will return 0.
Description
For example, ValLng("10") will return 10, and ValLng("10.60") will return 10 as well. 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. Any non-numeric characters, including decimal points and exponent specifiers, are considered non-suitable, for example, ValLng("23.1E+6") will just return 23.
ValLng can be used to convert integer numbers in Binary / Octal / Hexadecimal format, if they have the relevant identifier ("&B" / "&O" / "&H") prefixed, for example: ValLng("&HFF") returns 255.
If you want to convert a number into string format, use the Str function.
Example
Dim a As String, b As LongInt
a = "20xa211"
b = ValLng(a)
Print a, b
a = "20xa211"
b = ValLng(a)
Print a, b
20xa211 20
Dialect Differences
- Not available in the -lang qb dialect unless referenced with the alias __Vallng.
Differences from QB
- New to FreeBASIC
See also
