summation js

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Isabelle
26 Mar 2020
1console.log(
2  [1, 2, 3, 4].reduce((a, b) => a + b, 0)
3)
4console.log(
5  [].reduce((a, b) => a + b, 0)
6)
source
Dany
17 Apr 2016
1const summation = (n) => (n * (n + 1)) / 2;
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