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return ↔ JS Keyword to specify a single Variable/Expression output from function

References​

  1. void ↔ Type to rep no return value from function

  2. Memoization ↔ (Design Pattern) to Cache/reuse previous return value from Pure Function for specific args, to optimize perf

  3. Lazy Initial value ↔ function pass as Parameter into useState(), to assign return value as Initial State value, on first-call only

  4. Guard Clause ↔ Control Flow condition to trigger early return