  The pseudorapidity distribution of charged hadrons in pp collisions at
sqrt(s) =13 TeV is measured using a data sample obtained with the CMS detector,
operated at zero magnetic field, at the CERN LHC. The yield of primary charged
long-lived hadrons produced in inelastic pp collisions is determined in the
central region of the CMS pixel detector (abs(eta)<2) using both hit pairs and
reconstructed tracks. For central pseudorapidities (abs(eta)<0.5), the
charged-hadron multiplicity density is dN/d(eta)[charged,abs(eta) < 0.5] = 5.49
+/- 0.01 (stat) +/- 0.17 (sys), a value obtained by combining the two methods.
The result is compared to predictions from Monte Carlo event generators and to
similar measurements made at lower collision energies.
