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Software Engineering vocabulary · Code Review and Code Quality

Guard clause

Meaning in software engineering, with examples

nounCommon term

In software engineering, guard clause means: An early check that exits a function or block for a special case before the main logic runs.

In Turkish: koruma koşulu

How it is used

Used to reduce nested conditions. A guard clause may return or raise an error depending on the intended behavior.

Example sentences

  1. A guard clause returns an empty list when the search text is blank.

    The empty-input case ends early instead of wrapping all later work in a condition.

  2. We added a guard clause that rejects requests without a valid account ID.

    Invalid input leaves the normal processing path before any account lookup.

Common collocations

  • add a guard clause
  • early guard clause
  • if statementA piece of code that runs only when a condition is true, often followed by an else part that runs when the condition is false.
  • returnTo end a function and send a value back to the code that called it, for example when a password check gives back true or false.

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