Explain the functionality of Math random method

Question

How and where to use Math. random() method?

Answer 1

 The java.lang.Math.random() returns a double value with a positive sign, greater than or equal to 0.0 and less than 1.0.  

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

Output of randomNumbersWithRange(1, 5) 5 times:

2

4

2

1

3

Answer 2

You can use java.util.Random class.

int myNumber = new Random().nextInt(11) + 10