  The exclusive electroproduction of two pions in the mass range 0.4 <
M{\pi}{\pi} < 2.5 GeV has been studied with the ZEUS detector at HERA using an
integrated luminosity of 82 pb-1. The analysis was carried out in the kinematic
range of 2 < Q2 < 80 GeV2, 32 < W < 180 GeV and |t| < 0.6 GeV2, where Q2 is the
photon virtuality, W is the photon-proton centre-of-mass energy and t is the
squared four-momentum transfer at the proton vertex. The two-pion
invariant-mass distribution is interpreted in terms of the pion electromagnetic
form factor, |F(M{\pi}{\pi})|, assuming that the studied mass range includes
the contributions of the {\rho}, {\rho}' and {\rho}" vector-meson states. The
masses and widths of the resonances were obtained and the Q2 dependence of the
cross-section ratios {\sigma}({\rho}' \rightarrow {\pi}{\pi})/{\sigma}({\rho})
and {\sigma}({\rho}" \rightarrow {\pi}{\pi})/{\sigma}({\rho}) was extracted.
The pion form factor obtained in the present analysis is compared to that
obtained in e+e- \rightarrow {\pi}+{\pi}-.
