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【ES6】配列の要素の合計値をreduce()で求める【メモ】

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// 数値を格納した配列を用意
const pureNumArr = [1, 2, 3]

// 合計値を求める
let totalNum = pureNumArr.reduce((sum, element) => {
  return sum + element;
}, 0)
console.log(totalNum) // 6
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