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CodeWar: Sum of Digits / Digital Root
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| function digital_root(n) { | |
| if (n < 10) | |
| return n; | |
| return digital_root(n.toString().split('').reduce(function(acc, d) { | |
| return acc + + d; | |
| }, 0));; | |
| } | |
| console.log(digital_root(233412)) | |
| def digital_root(n): | |
| return n if n < 10 else digital_root(sum(map(int,str(n)))) |
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