80 lines
1.3 KiB
Markdown
80 lines
1.3 KiB
Markdown
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---
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id: 5a23c84252665b21eecc8042
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title: 平方和
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challengeType: 5
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forumTopicId: 302334
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dashedName: sum-of-squares
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---
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# --description--
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整数の配列の平方和を求める関数を記述してください。
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# --hints--
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`sumsq` は関数とします。
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```js
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assert(typeof sumsq == 'function');
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```
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`sumsq([1, 2, 3, 4, 5])` は数値を返す必要があります。
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```js
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assert(typeof sumsq([1, 2, 3, 4, 5]) == 'number');
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```
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`sumsq([1, 2, 3, 4, 5])` は `55` を返す必要があります。
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```js
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assert.equal(sumsq([1, 2, 3, 4, 5]), 55);
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```
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`sumsq([25, 32, 12, 7, 20])` は `2242` を返す必要があります。
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```js
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assert.equal(sumsq([25, 32, 12, 7, 20]), 2242);
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```
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`sumsq([38, 45, 35, 8, 13])` は `4927` を返す必要があります。
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```js
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assert.equal(sumsq([38, 45, 35, 8, 13]), 4927);
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```
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`sumsq([43, 36, 20, 34, 24])` は `5277` を返す必要があります。
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```js
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assert.equal(sumsq([43, 36, 20, 34, 24]), 5277);
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```
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`sumsq([12, 33, 26, 18, 1, 16, 3])` は `2499` を返す必要があります。
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```js
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assert.equal(sumsq([12, 33, 26, 18, 1, 16, 3]), 2499);
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```
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# --seed--
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## --seed-contents--
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```js
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function sumsq(array) {
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}
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```
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# --solutions--
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```js
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function sumsq(array) {
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var sum = 0;
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var i, iLen;
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for (i = 0, iLen = array.length; i < iLen; i++) {
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sum += array[i] * array[i];
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}
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return sum;
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}
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```
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