Java Math random integer generate in a range

Question

We would like to use Java Math class random() to generate integers in range. 


public class Main {
  public static void main(String[] args) {
    // your code here
  }
}



public class Main {
  public static void main(String[] args) {
   System.out.println((int)(Math.random() * 10) );
   System.out.println(50 + (int)(Math.random() * 50) );
  }
}

Note

Math.random() method generates a random double value greater than or equal to 0.0 and less than 1.0 (0 <= Math.random() < 1.0).

We can use it to write a simple expression to generate random numbers in any range.

For example, returns a random integer between 0 and 9. 

(int)(Math.random() * 10)

Returns a random integer between 50 and 99. 

50 + (int)(Math.random() * 50)

In general, returns a random number between a and a + b, excluding a + b. 

a + Math.random() * b



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