Snap! Reference Manual

Table of Contents

Table of Contents
Acknowledgements
1 Blocks, Scripts, and Sprites
2 Saving and Loading Projects and Media
3 Building a Block
4 First class lists
5 Typed Inputs
6 Procedures as Data
7 Object Oriented Programming with Sprites
8 OOP with Procedures
9 The Outside World
10 Continuations
11 Metaprogramming
12 User Interface Elements
Appendices
- A Appendix A. Snap! color library
- B Appendix B. APL features
- C All Snap! Blocks Reference
- Motion Blocks
- Looks Blocks
- Sound Blocks
- Pen Blocks
  - clear
  - pen down
  - pen up
  - pen down?
  - set pen color to
  - change pen by
  - set pen to
  - pen
  - change pen size by
  - set pen size to
  - stamp
  - fill
  - write size
  - pen trails
  - paste on
  - cut from
  - Color
  - Color Attribute
  - new color
- Control Blocks
  - When Green Flag Clicked
  - when is edited
  - when I start as a clone
  - when I receive
  - when key pressed
  - when
  - when I am
  - broadcast
  - broadcast and wait
  - Warp
  - wait secs
  - wait until
  - forever
  - repeat
  - repeat until
  - for _ = to
  - if
  - if else
  - if then else
  - report
  - stop
  - run
  - launch
  - call
  - pipe →
  - tell to
  - ask for
  - create a clone of
  - a new clone of
  - delete this clone
  - pause all ⏸
  - switch to scene
  - define
  - delete block
  - set of block to
  - Attribute Of Block
  - this
  - set slot to
- Sensing Blocks
  - touching ?
  - touching ?
  - color is touching ?
  - ask and wait
  - answer
  - mouse position
  - mouse x
  - mouse y
  - mouse down?
  - key pressed?
  - Distance To
  - Color at Location
  - reset timer
  - timer
  - current
  - Attribute Of
  - my
  - object
  - url
  - microphone
  - video on
  - set video transparency to
  - is on?
  - set to
- Operators Blocks
  - Command Ring
  - Reporter Ring
  - Predicate Ring
  - _
  - Subtract
  - _
  - Division
  - Power of Number
  - Mod
  - _
  - _
  - round
  - Math Functions
  - atan2 ÷
  - pick random to
  - _
  - _
  - _
  - _
  - _
  - not
  - _
  - join
  - split by
  - letter of
  - Attribute of Text
  - unicode of
  - unicode as letter
  - is a ?
  - is ?
- Variables Blocks

Snap! Reference Manual

A manual for Snap!

Author

Brian Harvey, Jens Mönig, Michael Ball, Jadga Hügle, Victoria Phelps, Bernat Romagosa

Published

May 8, 2025

Table of Contents

Snap! Manual Cover Image

Acknowledgements
Blocks, Scripts, & Sprites
Saving and Loading Projects
Building a Block
First-Class Lists
Typed Inputs
Procedures as Data
Object-Oriented Programming with Sprites
OOP with Procedures
The Outside World
Continuations
Metaprogramming
User Interface Elements
Appendix
Index

Acknowledgements

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