How to generate random numbers.

// The following program will generate 

// random number like the numbers gained by throwing a dice.

class dice

{

  public static void main(String args[])

  {

    int i,n;

    double r;

    for(i=1;i<=10;i++)

    {

      r=Math.random();

      n=(int)(r*6)+1;

      System.out.println(n);

    }

  }

}

The following illustration show how to write code for generating random numbers starting from 17 to 20. This mean the generated random numbers will be 17, 18, 19, 20.