Blender how to make object suddenly appear and dissapear

Blender how to make object suddenly appear and dissapear? It is simple

first, on your top right, right click your object "EYE" icon and press insert key frame

on your Timeline, drag to frame 20 example, then right click your object "EYE" icon and press insert key frame


so if frame 0 your eye icon is "DISABLE" then on frame 0 your object is gone
on frame 20 your eye icon is "ENABLE" then on frame 20 your object seem like suddenly appear

but if you want to render it you need to insert keyframe on the "CAMERA" icon just beside your "EYE" icon