Check a file type numeric

Question

Good Morning Gurus.
I Have a Dump , this dump occurs because  my program Check a variable numeric but in this variable have a value with letters ,then occurs dump.
  STATICS: v_catly TYPE zcatly,
            v_msgtx TYPE zmensagem_t.
   IF v_catly IS INITIAL OR v_catly = ' '.
     EXIT.
   ENDIF.
v_catly is type numeric ,but when check  " IF v_catly IS INITIAL OR v_catly = ' '."  it has the value '   BEA-3 .
The beter solution is?
1- check if variable have letters with 'CS, CA' ,if yes move to variable char or exist other way.
ERROR:
An exception occurred that is explained in detail below.
This exception cannot be caught in the context of the current statement.
The reason for the exception is:
The program attempted to interpret the value "BEA-3" as a number, but
since the value contravenes the rules for correct number formats,
this was not possible.
Thanks

Answer 1

Hi Ronaldo,
REPORT zao.
START-OF-SELECTION.
  DATA: v_catly(8) TYPE n VALUE 78213970.
  IF v_catly CO '0123456789'.
    WRITE: 'numbers'.
  ENDIF.
  DATA: lv_str TYPE string.
  lv_str = '782g13970'.
  FIND FIRST OCCURRENCE OF REGEX '([a-zA-Z])' IN lv_str.
  IF sy-subrc = 0.
    WRITE:/ 'letter'.
  ENDIF.