Scratch

nXIII wrote:

rdococ wrote:

nXIII wrote:

soupoftomato wrote:

Block 3: inverse of ()
This block gives the inverse (opposite) of a number.

1. Click "Make a block," and select "Operators," as the block group. For the type of block, you need to select the round, "reporter" block. In the naming bar, type, "inverse of." Press OK.

2. You should see the hat block with a block that says, "inverse of," in it. Remember how we added variables where the plus signs were last time? Do that after "of." When it asks for it's name, type, "number."

3. Because there are two types of inverses, positive, and negative. We need the script to check if the number is positive or negative. Put on if statement that says, "if number(the variable we made)> 0." And another if statement that says, "if number < 0."

4. Make a new variable called number1. In the first if, put "set number1 to (0-number). In the second if, put, "set number to (-1*number).

5. Now you're done and your scripts should look like this:

http://img213.imageshack.us/img213/2454/inverseof.gif

6. Press OK

Exactly what are you doing here?!
subtracting from zero and multiplying by negative one always produces the same result! I mean, really? I quote you saying, "two types of inverses, positive and negative." No there aren't. What the heck are you talking about. Are you trying to say, "the inverse of a positive number is negative, and the inverse of a negative number is positive"? Because its sign doesn't matter! Let's try a few examples, shall we?

#1: inverse of 3
0 - 3 = -3 Correct. However, error, 0 is not positive or negative, impossible to do. 0 is a nertaul.
3 * -1 = -3 Correct. However, error, Impossible to do in this block.

One comment from rdococ: Too much errors I have caught.
I think that covers everything, doesn't it? See what I mean?

It covers up nothing. 5 out of 6 errors.

um... what are you on about?
You can subtract stuff from zero.
0 - 10 = -10. Try it on a calculator.

0 - 10 is -10, but that does nothing, so why are you talking about?!?! And this is all on the inverse block. I also added changes of the quote I posted in this post. Clear enough?

rdococ wrote:

nXIII wrote:

rdococ wrote:

It covers up nothing. 5 out of 6 errors.

um... what are you on about?
You can subtract stuff from zero.
0 - 10 = -10. Try it on a calculator.

0 - 10 is -10, but that does nothing, so why are you talking about?!?! And this is all on the inverse block. I also added changes of the quote I posted in this post. Clear enough?

What are you on about? Really.

Okay, then. Here, all functional-y:
let f(x) = 0 - x

f is now the inverse function. Whatever I plug in (i.e. f(8) = -8) will be inverted.

The only reason I use "0 - x" instead of "-x" is because I'm trying to get the point across that "-x" means "0 - x"

Last edited by nXIII (2010-08-30 10:38:01)

ScratchReallyROCKS wrote:

nXIII wrote:

rdococ wrote:

0 - 10 is -10, but that does nothing, so why are you talking about?!?! And this is all on the inverse block. I also added changes of the quote I posted in this post. Clear enough?

What are you on about? Really.

Okay, then. Here, all functional-y:
let f(x) = 0 - x

f is now the inverse function. Whatever I plug in (i.e. f(8) = -8) will be inverted.

The only reason I use "0 - x" instead of "-x" is because I'm trying to get the point across that "-x" means "0 - x"

This argument seems completely pointless.

I know. I mean, I'm trying to convince him/her that you can in fact subtract things from zero!

Download the animate block! http://rapidshare.com/files/439696305/AnimateBlock.ypr that was used as an example.

I'm downloading 3.0.8 right now.  taking a lonnnnnnng time

Here's an easy one, but not the easiest one to make.

(Just make sure that the "final" variable is empty, not filled with a space.)

ImagineIt wrote:

Make a block? Where's that in variables?

Its at the bottom.

ImagineIt wrote:

Well I don't see it...

Are you trying to find it in Scratch? You need BYOB.

Wait now how do I use BYOB?

is there a way to make a new "key () pressed?" block with more keys like 'enter' and 'shift' and 'backspace', etc? that would be awesome...

gamer_6 wrote:

is there a way to make a new "key () pressed?" block with more keys like 'enter' and 'shift' and 'backspace', etc? that would be awesome...

Although what floppy_gunk said was true, it is possible to make a <no/any key pressed> block and a (key pressed) block. (Here's a link to one)

is their a way to make something that would be impossible?