  The aim of this article is to detect the ascent and descent of weighted
composition operators on Lorentz spaces. We investigate the conditions on the
measurable transformation $T$ and the complex-valued measurable function $u$
defined on measure space $(X, \mathcal{A}, \mu)$ that cause the weighted
composition operators on Lorentz space $L(p, q)$, $1 < p \leq \infty, 1 \leq q
\leq \infty$ to have finite or infinite ascent (descent). We also give a number
of examples in support of our findings.
