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.

Dim a As String, b As LongInt
a = "20xa211"
b = ValLng(a)
Print a, b

20xa211   20

• Not available in the -lang qb dialect unless referenced with the alias __Vallng.
  
  

• New to FreeBASIC
  
  

• CLngInt
  
• Val
  
• ValInt
  
• ValULng
  
• Str
  
• Chr
  
• Asc