How to use 'javascript add numbers in array' in JavaScript

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10function writeNumbers(array) {
11 var i = 0;
12 while (i < array.length) {
13 // Assume the array's length is evenly divisible by 10 to avoid length
14 // check overhead.
15 array[i++] = i;
16 array[i++] = i;
17 array[i++] = i;
18 array[i++] = i;
19 array[i++] = i;
20 array[i++] = i;
21 array[i++] = i;
22 array[i++] = i;
23 array[i++] = i;
24 array[i++] = i;
25 }
26 return i;
27}
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5function toNumber(arr) {
6 for (var i = 0; i < arr.length; i++) {
7 arr[i] = Number(arr[i]);
8 }
9 return arr;
10}

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