ANYXDIGIT Function

Searches a character string for a hexadecimal character that represents a digit, and returns the first position at which that character is found.

Category:	Character
Restriction:	I18N Level 2 functions are designed for use with SBCS, DBCS, and MBCS (UTF8).

Syntax

ANYXDIGIT(string <,start> )

Required Argument

string

is the character constant, variable, or expression to search.

Optional Argument

start

is an optional integer that specifies the position at which the search should start and the direction in which to search.

Details

The ANYXDIGIT function does not depend on the TRANTAB, ENCODING, or LOCALE system options.

The ANYXDIGIT function searches a string for the first occurrence of any character that is a digit or an uppercase or lowercase A, B, C, D, E, or F. If such a character is found, ANYXDIGIT returns the position in the string of that character. If no such character is found, ANYXDIGIT returns a value of 0.

If you use only one argument, ANYXDIGIT begins the search at the beginning of the string. If you use two arguments, the absolute value of the second argument, start, specifies the position at which to begin the search. The direction in which to search is determined in the following way:

If the value of start is positive, the search proceeds to the right.
If the value of start is negative, the search proceeds to the left.
If the value of start is less than the negative length of the string, the search begins at the end of the string.

ANYXDIGIT returns a value of zero when one of the following is true:

The character that you are searching for is not found.
The value of start is greater than the length of the string.
The value of start = 0.

Comparisons

The ANYXDIGIT function searches a character string for a character that is a hexadecimal character. The NOTXDIGIT function searches a character string for a character that is not a hexadecimal character.

Example

The following example uses the ANYXDIGIT function to search a string for a hexadecimal character that represents a digit.

data _null_;    
   string='Next = _n_ + 12E3;';  
   j=0;  
   do until(j=0);  
      j=anyxdigit(string,j+1);  
      if j=0 then put +3 "That's all";  
      else do;          
         c=substr(string,j,1);  
         put +3 j= c=;  
      end; 
   end;
run;

The following lines are written to the SAS log:

   j=2 c=e
   j=14 c=1
   j=15 c=2
   j=16 c=E
   j=17 c=3
   That's all