Randomint

[magicman]

I need some help on making a program that gives me a random
Int between 1-20 and 1-4.
thanx

[wtd]

Look in the Turing Tutorials forum. There's plenty of material there on how to generate random integers.

[Hikaru79]

Here's a quick method to do that. Learning to implement and call this method is up to you =)

code:

public static int randInt (int minBound, int maxBound) { int randomNumber; randomNumber = (int) Math.round(Math.random()*(maxBound+1))+minBound; return randomNumber; }

Tested and true

[wtd]

D'oh... got this one and Turing Help forum mxed up.

[zylum]

Hikaru79 wrote:

Here's a quick method to do that. Learning to implement and call this method is up to you =)

code:

public static int randInt (int minBound, int maxBound) { int randomNumber; randomNumber = (int) Math.round(Math.random()*(maxBound+1))+minBound; return randomNumber; }

Tested and true

that wont work, it should be:

Math.floor(Math.random()*(maxBound-minbound+1))+minBound;

[Hikaru79]

Ah, you're right. I see my mistake =)

Your code requires just a tiny bit of correction too, though. For one, you forgot to capitalize minBound in one of the cases. Also, it needs (int) in front of the assignment or else you get a compile error ("Possible loss of precision").

So, here's a final program:

code:

public class RandInt { public static void main(String [] args) { System.out.println (randInt(10,15)); } public static int randInt (int minBound, int maxBound) { int randomNumber; randomNumber = (int) Math.floor(Math.random()*(maxBound-minBound+1))+minBound; return randomNumber; } }

This will return a random number from minBound to maxBound which are 10 and 15 in this case.

Hope this helps =D