[lammps-users] Output Quantity

Hey all,
I have a very simple question on the output quantity. Does lammps by default output a scalar ?
such as c_therm_press, if no square brackets are specified after the command, this command
would output one global scalar(thats the global pressure), however if square brackets are followed, like c_therm_press[1],
then Pxx is output.
Is this right ? like a universal rule to all other output commands ?

you are correct - this is all discussed on the thermo_style custom doc page.