Mars is an "inner" planet, if that's what you mean. It is "inner", because it is in
the inner Solar System, fairly close to the Sun.
You haven't said what exactly Mars may be inside or outside of; certainly it is inside our solar system. It is farther from the sun than the planet Earth and therefore it could be described as being outside the Earth's orbit. Comment: Mars is called an "inner planet", of course. Perhaps that helps.
Jupiter is an outside planet. It is located beyond the orbit of Mars, making it one of the outermost planets in our solar system.
Mercury is an inner planet because it is the closest one to the sun. Inner planets: Mercury Venus Earth Mars
Mars is outside the asteroid belt. The asteroid belt is located between the orbits of Mars and Jupiter.
It is the outside planet. We classified planet to be inside or outside using asteroid belt as the boarder line.
Eris is an outside planet
The planet Jupiter is outside the asteroid belt, which is located in between the orbits of Mars and Jupiter.
It is not inside of the Asteroid Belt in the sense of being part of it. In terms of the order of orbits from the Sun, Mars is inside the orbit of the Asteroid Belt and Jupiter's orbit is outside the orbit of the Asteroid Belt.
Mars and Venus and the moon.
inner
Earth is inside the asteroid belt which lies between Mars and Jupiter.
mars