This document discusses seismic analysis of high-rise buildings using IS 1893-2002 and IS 1893-2016 codes. It analyzes a 50-story building model under both codes and compares results. Analysis includes response spectrum analysis, modeling the building in ETABS, and determining displacements, shear forces, and bending moments. The new code produced lower displacements of 0.16m compared to 1.08m in the old code. Shear forces decreased from 334kN to 188kN, indicating improvements in the revised code for seismic loading. The document concludes the new Indian code provides better estimates of seismic demand for structural design.