  For the first time, the total yield and inclusive spectra of the
$\Delta^{++}(1232)$isobar are measured in $\nu p$ and $\nu n$ charged-current
interactions. An indication is obtained that the $\Delta^{++}(1232)$ production
mainly results from the neutrino scattering on the valence d- quark of the
target nucleon. The total yield of $\Delta^{++}(1232)$ in $\nu p$ interactions
is compatible with that measured in hadronic interactions of the same net
charge and net baryonic number. The yield of $\Delta^{++}(1232)$ in $\nu n$
interactions is significantly suppressed as compared to the case of the proton
target. The form of the squared transverse momentum distributions, both in $\nu
p$ and $\nu n$ interactions, is found to be compatible with the available data
on the neutrinoproduction of $\Lambda$ hyperon. The experimental data are
compared with the LEPTO6.5 model predictions.
