Computer Science Canada

Regarding radom number generation
Author:  mzhang [ Thu Jul 21, 2005 12:33 am ]
Post subject:  Regarding radom number generation
This is my first post in this forum, although I've been reading past threads, this serves as my useless introduction.

As for random numbers, I usually just do

code:

int randomNumber = Math.random() * myRange;

.

I realize that this causes loss of precision in the number as rounding gives less chance of recieving 0 and myRange.

Can anyone post a alternate solution to generate random numbers?
Author:  [Gandalf] [ Fri Jul 22, 2005 2:08 am ]
Post subject: 
Yep, what you gave gives an error because what is returned is actually a long. This method works much better:
Java:
int RandomNumber = (int) (Math.random() * 100) % (maxNumber-minNumber+1) + minNumber;

If you need any help with an explanation, just say so - the % is a modulo (or modulus, whatever) operator - right now I'm a tad sleepy...
You see? I'm already giving Java advice on my 2nd or 3rd day!

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