$FUNCNAME$
  ISDIGIT()
$CATEGORY$
  STRING,NUMERIC
$SUMMARY$
   Determine if the leftmost character in a character string is a digit
$LANG_RU$
   ,       .
$SYNTAX$
     ISDIGIT(<cString>) --> lBoolean
$LANG_RU$
     ISDIGIT(< >) -->  
$ARGUMENTS$
     <cString> is the character string to be examined.
$LANG_RU$
     < > -  .
$RETURNS$
     ISDIGIT() returns true (.T.) if the first character of the character
     string is a digit between zero and nine; otherwise, it returns false
     (.F.).
$LANG_RU$
     ISDIGIT()   "" (.T.),    
         0  9,    - 
     "" (.F.).
$DESCRIPTION$

     ISDIGIT() is a character function that determines whether the first
     character in a string is a numeric digit between zero and nine.  If any
     other character is the first character of the <cString>, ISDIGIT()
     returns false (.F.).

     ISDIGIT() is useful where you need to know if the current character
     string is a number before converting it to a numeric value with the
     VAL() function.


$LANG_RU$

     ISDIGIT()     , 
     ,      < >
       0  9.       ,
         "" (.F.).

     ISDIGIT()  ,   , 
           ,    
        VAL().


$EXAMPLES$

       These examples demonstrate various results of ISDIGIT():

	? ISDIGIT("AbcDe")         // Result: .F.
	? ISDIGIT("1abcd")         // Result: .T.
	? ISDIGIT(".12345")         // Result: .F.


$LANG_RU$

           
       ISDIGIT():

       ? ISDIGIT("AbcDe")        //  : .F.
       ? ISDIGIT("1abcd")        //  : .T.
       ? ISDIGIT(".12345")       //  : .F.


$SEEALSO$
  ISALPHA(),ISLOWER(),ISUPPER(),LOWER(),UPPER()
$END$
