Math.random() explained
int randomWithRange(int min, int max)
{
   int range = (max - min) + 1;
   return (int)(Math.random() * range) + min;
}

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int randomWithRange(int min, int max)
{
   int range = Math.abs(max - min) + 1;
   return (int)(Math.random() * range) + (min <= max ? min : max);
}

double randomWithRange(double min, double max)
{
   double range = (max - min);
   return (Math.random() * range) + min;
}

double randomWithRange(double min, double max)
{
   double range = Math.abs(max - min);
   return (Math.random() * range) + (min <= max ? min : max);
}