It does have brakes (regenerative!), which usually work well, unless you need to stop extremely quickly, or there's RF interference and the remote momentarily loses connection (which is pretty rare and usually in the same location every time), or the battery is fully charged (thus nowhere for the energy to go)
But seriously, the brakes work pretty well. You should still learn to footbrake.
But seriously, the brakes work pretty well. You should still learn to footbrake.