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curriculum/challenges/italian/10-coding-interview-prep/rosetta-code/sum-of-squares.md

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+---
+id: 5a23c84252665b21eecc8042
+title: Sum of squares
+challengeType: 5
+forumTopicId: 302334
+dashedName: sum-of-squares
+---
+
+# --description--
+
+Write a function to find the sum of squares of an array of integers.
+
+# --hints--
+
+`sumsq` should be a function.
+
+```js
+assert(typeof sumsq == 'function');
+```
+
+`sumsq([1, 2, 3, 4, 5])` should return a number.
+
+```js
+assert(typeof sumsq([1, 2, 3, 4, 5]) == 'number');
+```
+
+`sumsq([1, 2, 3, 4, 5])` should return `55`.
+
+```js
+assert.equal(sumsq([1, 2, 3, 4, 5]), 55);
+```
+
+`sumsq([25, 32, 12, 7, 20])` should return `2242`.
+
+```js
+assert.equal(sumsq([25, 32, 12, 7, 20]), 2242);
+```
+
+`sumsq([38, 45, 35, 8, 13])` should return `4927`.
+
+```js
+assert.equal(sumsq([38, 45, 35, 8, 13]), 4927);
+```
+
+`sumsq([43, 36, 20, 34, 24])` should return `5277`.
+
+```js
+assert.equal(sumsq([43, 36, 20, 34, 24]), 5277);
+```
+
+`sumsq([12, 33, 26, 18, 1, 16, 3])` should return `2499`.
+
+```js
+assert.equal(sumsq([12, 33, 26, 18, 1, 16, 3]), 2499);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+function sumsq(array) {
+
+}
+```
+
+# --solutions--
+
+```js
+function sumsq(array) {
+  var sum = 0;
+  var i, iLen;
+
+  for (i = 0, iLen = array.length; i < iLen; i++) {
+    sum += array[i] * array[i];
+  }
+  return sum;
+}
+```