integer :: bs_nbands

The number of bands at each k-point when performing a band structure calculation.

If BS_NBANDS is present in the parameter file, the value of bs_nbands is determined by this keyword.

If BS_NEXTRA_BANDS is specified ${\tt bs\_nbands} = {\tt max(nup,ndown)} + {\rm BS\_NEXTRA\_BANDS}$.

If BS_PERC_EXTRA_BANDS is specified ${\tt bs\_nbands} = {\tt max(nup,ndown)} \times ( 1 + \frac{\rm BS\_PERC\_EXTRA\_BANDS}{100})$.

The default value of this parameter is .