JavaScriptの関数の基本構造から、なぜ必要なのか、どのように使うのかを初心者向けに丁寧に解説します。引数や戻り値など、つまずきやすいポイントを実例とともに整理し、理解を深められる内容です。現役エンジニアの視点で、実務でも役立つ関数の考え方を学べます。

JavaScriptの変数の基本を初心者向けにわかりやすく解説し、var・let・constの違いとそれぞれの役割を整理します。スコープや再代入の可否など、なぜ3種類の変数が存在するのかも実践的に理解できる内容です。現役エンジニアの視点から、つまずきやすいポイントを丁寧に解説します。

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