Scratch Programming Basics

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Block

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A piece of code that performs an action. In Scratch, blocks snap together to build a program.

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Script

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A group of connected blocks that makes something happen.

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Sprite

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A character or object in Scratch that performs actions.

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Backdrop

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The background or scene where your sprites perform.

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Loop

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A block that repeats actions (e.g., forever, repeat).

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Conditional

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A statement that checks whether something is true (e.g., if, if-else).

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Boolean

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A type of block that can only be true or false (like “touching sprite?”).

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Event

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Something that starts a script (e.g., when the green flag is clicked, when a key is pressed).

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Algorithm

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A step-by-step set of instructions for solving a problem or completing a task.

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Sequence

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The order in which instructions are carried out.