How does (int)(Math.random() + 0.5); work?

Question

Apparently it randomly generates 0 or 1, but I don’t understand how it does this.

Answer 1

Math.random returns a number between 0 and 0.999..

If Math.random returns (for example) 0.3 and you add 0.5 to it, you get 0.8 -

Explicit conversions turns 0.8 int to 0, dropping all data after 0.

If math random returns 0.7 and you add 0.5, you get 1.2

Explicit conversion will drop everything after 1 and you get result 1