[Sbcl-help] local variable unbound ?

[Gerard R. <g.r...@fr...>]

Hello,
the function : 
(defun f3 (s) (* 3 s)) works as expected.
For example: (f3 5) -> 15
So I think that (symbol-value s) -> 5 during the call of the function f3.
To verify that I rewrote the function f as follows:
(defun f3 (s) (print (symbol-value 's)) (* 3 s))
and now (f3 5) gives:
debugger invoked on a UNBOUND-VARIABLE in thread #<THREAD "initial thread" RUNNING {10029E5021}>:
   The variable S is unbound.

Type HELP for debugger help, or (SB-EXT:QUIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):
   0: [ABORT] Exit debugger, returning to top level.

(F3 5)
If I set the global variable s to 94 i.e. (defparameter s 94)
(f3 5) -> 94  15
Why I can't display the symbol-value of the local variable s ? (during
the call of the function f3)

tia

-- 
Gérard