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「paizaxQiita記事投稿キャンペーン」より、Dランク問題「N倍の文字列」を解きます。

言語はJavaScriptです。

for文を使用

回数分回して*を文字列追加しています。

let str = '';
for (let i = 0; i < lines[0]; i++) {
    str += '*';
}
console.log(str);

Arrayオブジェクトを使用

console.log(Array(+lines[0]).fill('*').join(''));

個数分の空配列作って、それを文字列*で満たし文字連結させます。

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