Merge pull request #1419 from juanarbol/juanarbol/add-gauss-sum-alg

Add Gauss sum or sum of k naturals.
2020-10-08 16:53:14 +03:00
parent cd93e7edd2 ec7fb4fe3f
commit 120d78f29d
1 changed files with 16 additions and 0 deletions
--- a/snippets/sumN.md
+++ b/snippets/sumN.md
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+---
+title: sumN
+tags: 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`.
+
+```js
+const sumN = n => (n * (n + 1)) / 2;
+```
+
+```js
+sumN(100); // 5050
+```