True & False Are NOT Boolean!?

Ok, that makes sense.

But what is → null? I asked myself this question already once in the past.

Is null = another word for undefined.

Comparing for example google Chrome and Microsoft-Edge, EDGE uses null as of my knowledge and CHROME → undefined. But maybe i misunderstood something.

Is null = 0 ???
Is null still something different as undefined → so → null ← is still defined but false?

Why do i need nulll in which cases ?

Is null an number?

What’s the exact definition of null.

As we can see, that → null ← is somekind of we don’t really know how to define, at least it looks like that.