Scratch

There's a forum topic that talks about them here,

http://scratch.mit.edu/forums/viewtopic.php?id=1653

Hopefully that will give you some idea of how they are used.

Now, a example for variables.

[blocks]For this example we'll use a "Score" variable. Comments are in blue.

Let's say everytime you click Sprite1 you get a point.

<when green flag clicked>
<set{ Score }to( 0 -- First it resets the score
<forever>
<wait( 0.5 )secs> -- Does this every 0.5 seconds
<go to x   <pick random( -240 )to( 240 )y   <pick random( -180 )to( 180 -- Goes to a random position
<end>

<when[ Sprite1 ]clicked>
<change{ Score }by( 1 -- When clicked, gives a point
<go to x   <pick random( -240 )to( 240 )y   <pick random( -180 )to( 180 -- Goes to a random position to make sure you don't cheat[/blocks]

That's my short lesson on Variables. You also might want to read my E-Book on it: link And also my E-Book on Scratch Math: link

Hope that helped! 

Last edited by technoguyx (2009-04-05 14:51:15)