Answer
Hooks must be called at the top level and not inside conditions or loops, allowing React to map hook states consistently.
Quick Answer
React internally tracks hook calls by their order in the call stack — hook #1, hook #2, etc. This is why hooks can't be called conditionally or inside loops. If the order changes between renders, React reads the wrong hook's state. React enforces this with a linting rule (rules-of-hooks) and runtime checks in development.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ