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Add exercise of multiply #488

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merged 1 commit into from
Oct 19, 2023
Merged

Add exercise of multiply #488

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10 changes: 10 additions & 0 deletions docs/1-trial-session/09-functions/_samples/multiply/index.html
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<!doctype html>
<html lang="ja">
<head>
<meta charset="utf-8" />
<title>2つの積 解答例</title>
</head>
<body>
<script src="./script.js"></script>
</body>
</html>
6 changes: 6 additions & 0 deletions docs/1-trial-session/09-functions/_samples/multiply/script.js
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function multiply(a, b) {
const result = a * b;
return result;
}

document.write(multiply(3, 4));
19 changes: 19 additions & 0 deletions docs/1-trial-session/09-functions/index.md
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Expand Up @@ -83,6 +83,25 @@ function tryToDrive() {

:::

### 確認課題

引数を 2 つとり、その積を<Term type="javascriptReturnValue">戻り値</Term>として<Term type="javascriptReturn">返す</Term><Term type="javascriptFunction">関数</Term> `multiply` を定義してください。

<Answer type="2つの積">

```javascript
function multiply(a, b) {
const result = a * b;
return result;
}

document.write(multiply(3, 4));
```

<ViewSource url={import.meta.url} path="_samples/multiply" />

</Answer>

## <Term type="javascriptVariable">変数</Term>の<Term type="javascriptScope">スコープ</Term>

<p><Term type="javascriptFunction">関数</Term>内で<Term type="javascriptDeclaration">宣言</Term>された<Term type="javascriptVariable">変数</Term>は、<Term type="javascriptFunction">関数</Term>内でのみ有効です。<Term type="javascriptVariable">変数</Term>が有効な範囲のことを、その<Term type="javascriptVariable">変数</Term>の<Term type="javascriptScope" strong>スコープ</Term>と呼んでいます。</p>
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