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JavaScript関数の書き方 まとめ

Last updated at Posted at 2020-06-19

備忘録として残します。

// 関数宣言
function double(x) {
  return x * 2;
}

// 関数式
const double = function(x) {
  return x * 2;
}

// アロー関数
const double = (x) => {
  return x * 2;
}

// 引数が一つの場合()省略可能
const double = x => {
  return x * 2;
}

// 一行の場合は{}も省略可能
const double = x =>  x * 2;

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