Basic Random Rolling Dice Java

Question

I am trying to write a method rollDice(int number, int nSides) which returns the total result of rolling the number dice with nSides sides.

So for example rollDice(3

Answer 1

When you use % on a negative number you get a negative number.

In this case the solution is simple, use

int roll = r.nextInt(nSides) + 1; // 1 to nSizes
num += roll;