4 lines
150 B
BQN
4 lines
150 B
BQN
sym ← ∾"0A"+⟜↕¨10‿26
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CheckIBAN ← 1=·(97|⊣+(10⋆1+>⟜9)⊸×)´∘⌽4⌽36(>/⊢)sym⊸⊐
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CheckIBAN "GB82 WEST 1234 5698 7654 32"
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