According to Bohr’s atomic model, the angular momentum of orbits is multiple of

According to Bohr’s atomic model, the angular momentum of orbits is multiple of $h/2\pi$.

Bohr's theory states that an electron can only move in orbits where its angular momentum is an integral multiple of $h/2\pi$. An electron's angular momentum in the nth orbit is $=$ $\mathit{nh}/2\pi$.
The h-planck constant
$p=$ $\mathit{nh}/2\pi$
$n\to$integer
$p$ is a perfect square multiple of $h/2\pi$.