FAQ: Static Variables and Methods - Static Methods Refresher

This community-built FAQ covers the “Static Methods Refresher” exercise from the lesson “Static Variables and Methods”.

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FAQs on the exercise Static Methods Refresher

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Won’t this make it possible to get 11?
if Math.random generates 0 or 1, isn’t it suppose to be like the below code?

int randomNum = (int)(Math.random() * 9) + 1;

If we look at the documentation for the method, we see that Math.random() produces a double number in the range [0.0, 1.0). This means that 0.0 is included in the range but 1.0 is not included in the range.
Math.random() will give you [0.0, 1.0)
Math.random() * 10 will give you [0.0, 10.0)
(int)(Math.random() * 10) will give you [0, 10)
(int)(Math.random() * 10) + 1 will give you [1, 11) i.e. an integer which can be any of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10