Computer Science Canada [Tutorial] 3 Step Guide To Random Integers

Author:  Genesis [ Fri Sep 24, 2004 10:06 pm ]
Post subject:  [Tutorial] 3 Step Guide To Random Integers

I spent half an hour today trying to get this to work. (I haven't used VB in a while.) So I figured I'd write a very short and easy tutorial on it.

Though there are other, better ways to do this. (Through the use of functions and such, which I may post a tutorial on later.) This way is the simpelest.

Step 1: Create a button, and change the caption to something like "Generate".

Step 2: Create a text box, and delete the default text to make it blank.

Step 3: Double click on the button you created and the code window should appear. Type this:

 code: Private Sub Command1_Click() Randomize Text1 = Int(Rnd * 10) End Sub

Where Text1 is the name of the text box you created on the Form, Int is the type of number you want to generate, and (Rnd * 10) is a number between 1 and 10.

That's all I can think of to put here. Should you need more help, feel free to post.

 Author: Tony [ Sun Sep 26, 2004 12:25 am ] Post subject: I'd just like to add that Rnd generates a random value between 0 and 1. *10 operation just extends the range of the random output. Int() typecasts the value into integer. I dont remember how Visual Basic works. If it drops the floatpoint (as C++ does) you might not be able to generate 10 that way. So just test.

 Author: Acid [ Sun Sep 26, 2004 11:09 am ] Post subject: Int() makes it drop the floatpoint. I think you'd have to go * 11 to get one between 1 and 10

Author:  Brightguy [ Mon Sep 27, 2004 6:50 am ]
Post subject:  Re: [Tutorial] 3 Step Guide To Random Integers

*11 would make it go between 0 and 10. The number returned by Rnd is greater than or equal to zero, but less than one.

Use this formula to generate a random number from the range lngLowerBound to lngUpperBound:
 code: Private Function Random(lngLowerBound As Long, lngUpperBound As Long)      Random = Int(Rnd * (lngUpperBound - lngLowerBound + 1) + lngLowerBound) End Function

You could either put Randomize in the function, or just in the Form_Load.

 Author: Acid [ Mon Sep 27, 2004 1:34 pm ] Post subject: Re: [Tutorial] 3 Step Guide To Random Integers Brightguy wrote:*11 would make it go between 0 and 10. The number returned by Rnd is greater than or equal to zero, but less than one. Right. Your way made much more sense.

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