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- function sumDigits(arr) {
- if (arr.length === 1) {
- console.log(arr[0]);
- return;
- }
- for (let i = 0; i < arr.length - 1; i++) {
- arr[i] = Number(arr[i] + arr[i + 1]);
- }
- arr.pop();
- sumDigits(arr);
- }
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