Random 'Integer' performance

[Kino]

Short question.
Assuming I want a 20% chance for something to occur, is there any meaningful difference (performance wise) between (Random int 1 - 10, >3) and (Random int 1 - 100, >21)

 

[IcemanBo]

There's no performance difference. The check is probably meant as " x < 3 " ... " x < 21 ". : )

 

[Rahko]

If you want a 20% chance you have to make either "Random int between 1 and 10 is less than or equal to 2" or "Random int between 0 and 9 is less than 2".

It's easy to imagine like this: 10 should be 100% chance, therefor it has to be always true. And 0 is 0% chance, i.e. it has to always be false. "Random(1-10) <= 0" is always false and "Random(1-10) <= 10" is always true. "Random(1-10) < 10" Would be true only 90% of the time, because if the random number happened to be 10, it would not be less than 10.