'Is Lean 4 lazy or strict?

Lean 4 is a purely functional programming language, but is it lazy (like Haskell) or strict (like Idris) and what are the implications of this? Is there a way to opt-in (or opt-out) of laziness?

lazy-evaluationlean


Solution 1:[1]

Lean 4 is a strict language like Idris.

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Source: Stack Overflow

Solution Source
Solution 1 Leonardo de Moura

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