Crystal Reports for Rational Application Developer Designer Guide

The following example searches for the first occurrence of a digit in an input string. If a digit is found, it returns its position, otherwise it returns -1. In this case, the input string is set explicitly to a string constant, but it could be set equal to a String type database field instead. For example, for the input String, "The 7 Dwarves", the formula returns 5, which is the position of the digit 7.

Local StringVar inString := "The 7 Dwarves";
Local NumberVar strLen := Length (inString);
Local NumberVar result := -1;
Local NumberVar i := 1;
While i <= strLen And result = -1 Do
(
   Local StringVar c := inString [i];
   If NumericText (c) Then
      result := i;
   i := i + 1;
);
result