Resolved: Lua math.random explain

Question:

sorry for asking this question but I couldn’t understand it
I don’t understand the structure what is (2) and why it’s == 1
Thank you a lot

Answer:

math.random(x) will randomly return an integer between 1 and x.
So math.random(2) will randomly return 1 or 2.
If it returns 1 (== 1), ballDX will be set to 100.
If it returns 2 (~= 1), ballDX will be set to -100.
A simple way to make a 50-50 chance.

If you have better answer, please add a comment about this, thank you!