# Define the name and parameter(s) of the procedure.
__f__ := proc(__l__::list(numeric))

# Define variables that are local to the procedure.
        local __avg__, __i__;

# Define the statements of the procedure.
        __avg__ := add(__l__[__i__], __i__ = 1..nops(__l__))/nops(__l__);

# Define the return value of the procedure.
        return __avg__;

end proc;

__f__([1, 2, 4, 8, 16, 32, 64]);