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New WINDEV, WEBDEV and WINDEV Mobile 27 feature!
  • Conversion range
  • Val function and UNICODE
  • Miscellaneous
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Stored procedures
<Ansi string type>.ToNum (Function)
In french: <Type Chaîne ansi>.VersNumérique
Returns the numeric value of a character string. This feature enables you to perform numeric calculations on the character strings.
Remark: This function is equivalent to Val.
s is string
s = "143"
s.StringToNum()    // Returns 143
s = "1.67"
s.StringToNum()   // Returns 1.67
s = "ABC"
s.StringToNum()    // Returns 0
s = "3plus2"
s.StringToNum() // Returns 3
s = "7,5"
s.StringToNum()    // Returns 7
s = "1D2"
s.StringToNum()    // Returns 100
s = "2.5e-2"
s.StringToNum() // Returns 0.025
<Result> = <Initial string>.ToNum([<Base used>])
<Result>: Real or integer
  • Numeric value of the string.
  • 0 if an error occurs.
AndroidAndroid Widget Java In this version, <Result> corresponds to a real.
<Initial string>: Character string or Buffer
Character string to convert to a numeric value.
For a real, the separator must be the dot ('.') and the prefixes for scientific notation can be 'E', 'e', 'D' or 'd'. If the separator is a comma, the numbers after the comma will be ignored.
<Base used>: Character string or integer (optional)
Base in which the number is represented. The possible values are as follows:
  • "d": base 10 (decimal)
  • "x": base 16 (hexadecimal)
  • "o": base 8 (octal)
  • an integer between 2 and 36
Base 10 is used by default.
WEBDEV - Browser codeUniversal Windows 10 App This parameter is not available. Base 10 is automatically used.

Conversion range

<Ansi string type>.ToNum converts a string to an integer if the value is between -9.223.372.036.854.775.808 and 9.223.372.036.854.775.807.

Val function and UNICODE

The <Initial string> can be an ANSI or UNICODE string
For more details on UNICODE, see Managing UNICODE.


If a character of <Initial string> cannot be interpreted as a number, <Ansi string type>.ToNum stops interpreting <Initial string> and returns the number corresponding to the characters already read.
Reals can be converted from base 10 only. In other bases, all characters after "." (point) will be ignored.
Component: wd270vm.dll
Minimum version required
  • Version 27
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