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Vocabulary

Understand the term. Connect the concept.

A practical dictionary of 512 AI, machine learning, mathematics, and programming terms from HerbDev’s AI Vocabulary app. Start with a definition, explore an example, then follow the concepts behind it.

Linked concepts open in a new tab. Audio reads the definition and example.

Closure

Functions & Programming Concepts · Level 2 of 5

Closure

A callable that retains access to bindings from its surrounding scope.

Capture semantics determine whether values or references are retained.

Example

A returned function remembers the multiplier supplied when it was created.

Listen to the definition and example

Audio transcript

Closure. A callable that retains access to bindings from its surrounding scope. Capture semantics determine whether values or references are retained. For example: A returned function remembers the multiplier supplied when it was created.

Explore this concept

A useful analogy

A function carrying a backpack of surrounding bindings it may need later.

Why it matters

This helps you distinguish a computation’s contract, inputs, outputs, and behavior.

Technical detail

A closure pairs executable code with an environment. Captures may retain references, which can affect lifetime and later behavior.

Common misconception

A captured variable is not always frozen at its creation-time value.

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Related concepts

Quick recall question

Try answering before looking back at the definition.

Put the terminology into context: How AI works · Machine-native representations · All learning paths

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