def digits.go
import bend-kit-tar@0.3.0.0/tar.bend as Tarimport Base
583def digits.go(n: Nat, +v: U32, +c: U32) -> U32:
584 match n:
585 case 0n:
586 c
587 case 1n+p:
588 digits.go(p, (v / 10 : U32), Bool.pick(U32, U32.is_le(10, v), (c + 1 : U32), c))