WolframLang: Show Function Help
Type
?FunctionName
in
Notebook
.
For example, if you want to see the doc for the function StringLength
:
(* return help string of StringLength *) (* FullForm syntax *) Information[ "StringLength" ] (* shortcut syntax *) ?StringLength

If you are runnig WolframScript in terminal, use:
TextForm[ ?StringLength ] (* prints StringLength["string"] gives the count of characters in a string. *)
