Of recent, there has been a lot of talk about the use of nuclear warfare after the Russian invasion into the Ukraine. However, there are many predictions about how the world could end - let's look at them. Source 5h
The world does not really end - it will just change and transition from one era to another. Christ will return in glory to establish his kingdom throughout the universe. The dead will be judged. It is not so much the end as a new beginning. It will be an end for some people and beings; those who are subjected to the second and final death.
Somethings world can have a different meaning; instead of planet or universe it can mean "This present age" in which case it certainly will end.