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【JavaScript 】アロー関数

JavaScript

Posted at 2019-01-18

アロー関数

const add = (x, y) => {
  return x + y;
};
console.log(add(10, 5)); // 15

// 1行で
const sub = (x, y) => x - y;
console.log(sub(10, 5)); // 5

// 仮引数が１つのとき
const x2 = x => x * 2;
console.log(x2(10)); // 20

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