Check string for any letter

Hiya!

Is there a way for checking is string contains alphabets?
Meaning I want to check if the string has any letters in it and if it does then reject it.

Thanks for any help!

Not sure if I have seen a default pml function for testing presence of a letter in a string but if you create a code like below and put it inside a function then it can work.
!teststring = '100 hours'
!sourcestring = 'abcdefghijklmnopqrstuvwxysz'
!matchfound = false
do !i from 1 to !sourcestring.Length()
    If !teststring.match(!sourcestring.substring(!i,1)).gt(0) or !teststring.match(!sourcestring.substring(!i,1).upcase()).gt(0) then
        !matchfound = true
        break
    endif
enddo
If !matchfound.eq(true) then
   $P !teststring contains an alphabet!
else
   $P !teststring doesn't contain an alphabet!
endif

The string object also has a .IsDigits() and a .IsLetters() method, so you could simply do "q var !string.isdigits()" which will return TRUE if the string is only digits  and FALSE otherwise, or "q var !string.isletters()" which will return TRUE if the string is only letters and FALSE otherwise.

Thanks for the help!