which of the following is a possible output from invoking Math.random()?

1.25 3.04 5 0.06 19.2 99.5 0.28 1 0.99 100

Given two integers a and b, assuming a < b, the formula to generate a random integer between a and b is : a + (int)( Math.random() * (b a + 1) ) , can you explain why?

Using java Math.random() method, How to generate a random integer between 1 and 99? How about between 1 and 100? How to generate a random integer between 0 and 99? How about between 0 and 100?