Function IsDigit() | Xbase++

Tests whether a character string begins with a digit.

IsDigit( <cString> ) --> lDigit

<cString> is a character string expression.

When the first character in <cString> is a digit (numeral), IsDigit() returns the value .T. (true), otherwise it returns .F. (false).

The character function IsDigit() tests whether the first character in a character string is a digit between "0" and "9". If the first character is any other character IsDigit() returns the value .F. (false).

The result depends on SET COLLATION and can be manipulated by LocaleConfigure() .

IsDigit()

// The example shows various results for the function IsDigit() 

PROCEDURE Main 

   ? IsDigit("One Xbase++")         // result: .F. 
   ? IsDigit("2   Xbase++")         // result: .T. 

   ? IsDigit(".067")                // result: .F. 
   ? IsDigit("1,null")              // result: .T. 
   ? IsDigit( Time() )              // result: .T. 

RETURN

If you see anything in the documentation that is not correct, does not match your experience with the particular feature or requires further clarification, please use this form to report a documentation issue.

Function IsDigit() Foundation