How to get a random between 1 - 100 from randDouble?

[Cleo Millet]

Hello,

Okay, I'm still fairly new to Java. We've been given an assisgnment to create a game where you have to guess a random integer that the computer had generated. The problem is that our lecturer is insisting that we use:

double randNumber = Math.random();

And then translate that into an random integer that accepts 1 - 100 inclusive. I'm a bit at a loss. What I have so far is this:

//Create random number 0 - 99
double randNumber = Math.random();
d = randNumber * 100;

//Type cast double to int
int randomInt = (int)d;

However, the random the lingering problem of the random double is that 0 is a possibility while 100 is not. I want to alter that so that 0 is not a possible answer and 100 is. Help?

[Rabbit]

Add one.

[Cleo Millet]

I'm afraid I don't understand you answer. Add 1 to what and where?

[Rabbit]

Add one to your random number after you multiply by 100.

[Cleo Millet]

@Rabbit
Ah, thanks. That did it.

[Rabbit]

No problem, good luck.