The evolution of a 2Mo star was studied until the star possessed a helium core containing approximately 10 per cent of the star's mass. Radiation pressure and electron degeneracy have been included in the equation of state. Both the proton-proton cycle and the carbon-nitrogen-oxygen cycle have been included in the calculation of the nuclear-energy production. Improved surface boundary conditions have been used. The evolutionary track of a 2Mo star is similar to that of the more massive stars. Electron degeneracy increases the pressure by 13 per cent in the core of the most evolved model in this study. The ratio of the radiation pressure to the total pressure becomes as high as 4 per cent near the surface of the star. The relative amounts of time that the 2Mo star spends in the hydrogen-depletion, the hydrogen-exhaustion, and the helium-core phases are approximately 72:3:25.