we have developed a search engine , as usual the search box works without having to click an extra button , once the user enter's the search query and press enter, the result is shown.
Now, my search text-box has both numerical and string searching ability in a single text-box.
Question is, what is the best way to represent to the user? so that he knows he can search both number and a string as a single search query?. My default would be this "5466 or stack" , but is looks too casual and i don't think it conveys much of a meaning to users.