javascript - ~~(0+Math.random()*51) What is the difference between adding zero and not?

Question

I tested and found no difference

~~(0+Math.random()*51)

Answer 1

It’s probably useless, maybe it’s a formula that has been preserved.

Answer 2

Who can understand the question written like this? It would be better to write it as Math.floor(Math.random() * 51).