RosettaCodeData/Task/Iterated-digits-squaring/J/iterated-digits-squaring-7.j
2023-07-01 13:44:08 -04:00

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itdigsq1=:1 = sumdigsq^:(0=e.&4)^:_"0
digsq1e8=:(I.itdigsq1 i.649) e.~ sumdigsq