  The multiplicity dependence of event-by-event fluctuations in mean transverse
momentum, $\langle p_{\rm T} \rangle$, of charged particles has been studied in
p$-$p collisions at $\sqrt{s}$ = 7 TeV and 13 TeV using the PYTHIA 8 event
generator. The charged particles were selected in kinematic range of $0.15 <
p_{\rm T}<2$ GeV$/c$ and $|\eta| < 0.8$. The dynamical fluctuations would
indicate towards the correlated emission of particles. The measurements in
A$-$A and p$-$p collisions has shown a decrease in the strength of $ \langle
p_{\rm T} \rangle$ fluctuations with the average charged particle multiplicity.
The effects of various microscopic processes like color reconnection and
multi-partonic interactions has been studied. A minimal dependency on the
collision energy is also observed. Furthermore, the fluctuation observables are
investigated in the intervals of transverse spherocity in order to comprehend
the relative contributions resulting from hard scattering and underlying
events. The present study would act as a baseline for future measurements in
A$-$A as well as p$-$p collisions at the LHC.
