Scratch

QuickSilver is a programming language within Scratch. It features variable spawning and naming, a unique Telepoint system for flow control, and a compiler and decompiler to share coding!

Tutorial

Running a Program

There are two ways to run a QuickSilver program:

Dev Run
To Dev Run, you first type your program out on a plaintext document (TextEdit in Macs, NotePad in windows), and save it on the Desktop. To run it, show the list named Program, right-click it, and select import, and then navigate to your file. Then, press the green flag, and type R in the text box. This method is the best for making a program.

Presentation Run
If you want to run a program by someone else, ask them to post the compilation. It will look like this:

Testing#PRINT$#Hello world#STOP

Simply press the green flag, type D, and then paste that coding in the ask box. Then, press the green flag again, and type R.
By the way, to compile a program you just ran, press the green flag, and type C. Then copy the coding that appears at the bottom of the list Terminal.

Syntax:

QuickSilver coding has simple syntax. The first line of any code is dedicated to a title/note, and is ignored. Then, you type a command or a Telepoint. I will explain Telepoints later. Any command will have one or many arguments. You type each argument in a new line. Example:

CLS [clears terminal]
PRINT$ [means print string]
Hello world [text to print]

Any code will end with 'STOP', which stops the script. Finally, no text (title, variable/telepoint names, print/input text) in the coding can contain the hash (#), or your compiler will mess up.

That's pretty much it!

To print Hello World
PRINT$
Hello World
STOP

Variables

Variables

To make a variable, you type:

%<variable name here>

To access a variable, you type:

^%<variable name here>

Here are all the variable commands:

SET
^%<var name>
<value>

INPUT
<text to display for input>
^%<var name>

+ <can be replaced with -,*,/,^,MOD>
^%<var to store result in>
<variable or number>
<variable or number>

PRINTV
^%<var name>

JOIN
^%<variable to store answer in>
<variable or string>
<variable or string>

GETLETTER
^%<variable to store answer in>
<variable/number>
<variable or string>
$//note//Basically this one is the (letter (1) of [hello]) block.

LENGTH
<variable to store result in>
<variable or string>

Operators can access variables and constants.

Telepoints

A Telepoint is a marker in a script:

To explain Telepoints
$This_is_a_telepoint

They start with a $.

Telepoints are best used for flow control, but can also help clean up coding. Here's how you can use a Telepoint in flow control:

Telepoint explanation: infinite loop, will print Hi! forever
$loop
PRINT$
Hi!
JMP
^$loop
STOP

To explain Telepoints
%n
%x
INPUT
How many times to I print hi?
%x
$loop      <= Telepoint name
PRINT$
Hi!
BRANCH< <can be replaced with = or >, too> <= Branch command
^%n
^%x
^$loop <= Telepoint to jump to
STOP

The BRANCH command tells you to go to the labelled Telepoint if the condition (v1 =/>/< v2) is fulfilled.

Last edited by Hardmath123 (2011-04-17 07:04:59)