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30-seconds-of-code/snippets/sumN.md
Isabelle Viktoria Maciohsek ec7fb4fe3f Update and rename gauss-sum.md to sumN.md
2020-10-08 16:52:55 +03:00

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sumN math,beginner

Sums all the numbers between 1 and n.

  • Use the formula (n * (n + 1)) / 2 to get the sum of all the numbers between 1 and n.
const sumN = n => (n * (n + 1)) / 2;

sumN(100); // 5050