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What does "feature flag" mean in programming?
feature flag is one of the most common terms in software development. This guide explains what it means, how it is used in practice, and why it matters, with real examples from the developer world.
Definition
A conditional in code that enables or disables a feature at runtime, controlled by configuration without a deployment. Allows gradual rollouts, A/B testing, and instant rollbacks. Also called feature toggle or feature switch.
Example
"The new checkout flow is behind a feature flag — enable it for 10% of users first and monitor error rates."
Related terms
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