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12. Constants (define-constant)

Immutable values bound at deployment.

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Constants are evaluated at deployment time and remain immutable. They commonly define error codes and contract administrators.

clarity
(define-constant ERR_UNAUTHORIZED (err u100))
(define-constant OWNER tx-sender)

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  1. 1. Can a constant be updated after deployment?

  2. 2. What is a common use for constants?

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