If sun lost all its energy what would happen to earth and its inhabitants

If you put a steamy cup if coffee in refrigerator, it wouldn't immediately turn cold. Likewise, if the sun simply turned off, the earth would stay warm - at least compared with the space surrounding it - for a few million years. But we surface dwellers would feel the chill much sooner than that. within a week, the average global surface temperature would drop below 0degree F. In a year, it would dip to - 100degrees. The top layers of oceans would freeze over

Although some microorganisms living in the earths crust would survive, photosynthesis would halt immediately, and most plants would die in few weeks, and animals who eats plants would die off quickly