Scratch

The easiest way to get a number from the user is to create a variable and display it on the screen.  Then, right-click on the variable and set it to Slider mode which will allow the user to enter a value from zero to 100.  Right-click again and you can set the limits of the slider, if you want something different.  If you are using a Mac computer, I think it is Opt-Click or something instead of Right-click.

So with the slider variable, you will probably want go have a starting value set on the Green Flag

[blocks]
<when green flag clicked>
<set{ Number1 }to( 0
[/blocks]

You can use the default cat sprite to do the calculation and display the output when it is clicked

[blocks]
<when[ Sprite 1 ]clicked>
<set{ Number 1 }to( (( 2 <*> (( Number 1 <+> 5 )) ))
<say[ Number 1 ]for( 10 )secs>
[/blocks]

Last edited by Paddle2See (2008-03-06 08:31:14)

You can find numeric keypad entry already written for you in various calculator projects, for example, my RPN calculator:

http://scratch.mit.edu/projects/kevin_karplus/76772