Question Mark (?)

?: Predicate

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Follows a statement in a block, which must return 0 or 1. If it's 0, stop the current body and evaluate the next eligible one instead. Variables defined before the ? stay if execution continues (1) but don't carry over to other bodies (0).

    {0 ? 3 ; 4}
4

    Min ← {𝕨<𝕩 ? 𝕨 ; 𝕩}

    3 Min 5
3

    4 Min 2
2