Software Engineering vocabulary · Programming Concepts

Mutable state

Meaning in software engineering, with examples

nounAdvanced term

In software engineering, mutable state means: Program state that can be changed after creation, such as variables or objects whose stored values are updated over time.

In Turkish: değiştirilebilir durum

How it is used

Used in programming, state management, and concurrency discussions. Teams often limit mutable state because shared updates can make code harder to predict and test.

Example sentences

  1. The bug came from mutable state in the cache object, which one request updated while another request was still reading it.

    Here, mutable state refers to shared data that changes over time, creating inconsistent behavior when different operations access it together.

  2. Our instructor asked us to remove mutable state from the example so the function would always return the same result.

    In this example, the term points to changeable stored values that affect whether a function behaves predictably.

Common collocations

  • mutable state
  • shared mutable state
  • avoid mutable state
  • state mutation

More terms: Programming Concepts

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