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並前往https://gist.github.com/ryohtarot/c965e74626f6f5d39a299fb9cbacf0b5

【Dart】リスト（配列）の合計を求める方法 - gists · GitHub

void main() {. var iterable = [1, 2, 3, 4, 5];. var sum = iterable.reduce((value, element) => value + element);. print(sum); // Output: 15.

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