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The Scratch interface is divided into three main sections: a stage area, block palette, and a coding area to place and arrange the blocks into scripts that can be run by pressing the green flag or clicking on the code itself. Users may also create their own code blocks, which will appear in the "My Blocks" section.
Blocks are connected from left to right, like words, contradicting the top to bottom connections that the original Scratch language uses. The main coding area is displayed at the bottom of the screen, with the stage in the center, the scene on the right, and the sprites on the left.
Snap!'s blocks are divided into eight groups: Motion, Looks, Sound, Pen, Control, Sensing, Operators, and Variables. The layout of these groups in the block group selector is shown in the table below. The central area can show scripts, costumes/backdrops, or sounds associated with the selected sprite. What that area shows depends on the ...
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The definition describes the block's appearance (user interface) and the generator describes the block's translation to executable code. Definitions and generators can be written in JavaScript, or using a visual set of blocks, the Block Factory , which allows new blocks to be described using extant visual blocks; the intent is to make creating ...
For example, in resource management in structured programming, one generally acquires a resource, followed by a block of code using the resource, and finishing with releasing the resource. The acquisition/release pairing is hard to see if there is a long block of code in between, but easy to see if the intervening block is folded.
This is an index to notable programming languages, in current or historical use. Dialects of BASIC, esoteric programming languages, and markup languages are not included. A programming language does not need to be imperative or Turing-complete, but must be executable and so does not include markup languages such as HTML or XML, but does include domain-specific languages such as SQL and its ...