_A_r_g_u_m_e_n_t _L_i_s_t _o_f _a _F_u_n_c_t_i_o_n
	
	     args(fun)
	
	_A_r_g_u_m_e_n_t_s:
	
	         fun : an interpreted function.  If fun is a charac-
	               ter string then the function with that name
	               is found and used.
	
	_V_a_l_u_e:
	
	     A function with identical formal argument list but an
	     empty body.  This function is mainly used interac-
	     tively.  For programming, use formals instead.
	
	_S_e_e _A_l_s_o:
	
	     formals, help.
	
	_E_x_a_m_p_l_e_s:
	
	     args(args) #-> NULL (args is a 'primitive' function).
	     args(plot.default)