  After a brief introduction to lattice QCD, I summarize the results for the
light quark masses and the bag parameters $B_K$, $B_6^{1/2}$, and $B_8^{3/2}$.
The implications of these results for the standard model estimates of CP
violation parameters $\epsilon$ and $\epsilon'/\epsilon$ are also discussed.

High Energy Physics - Phenomenology;High Energy Physics - Lattice