What does the quantum number n represent in the Bohr model?

In the Bohr atomic model, the quantum number n is an integer used to label the fixed-size, circular orbits in which electrons travel around the nucleus.1

Because Bohr postulated that an electron's angular momentum is quantized, these orbits are restricted to specific, discrete values. The quantum number n determines both the size and the energy of these orbits: smaller values of n correspond to orbits closer to the nucleus with lower energy, while larger values correspond to orbits farther away with higher energy. The state with n = 1 represents the smallest possible orbit and the atom's most stable, lowest-energy state.12