30-seconds-of-code/javascript/snippets/sum-n.md

title, type, tags, cover, dateModified

title	type	tags	cover	dateModified
Sum of numbers until n	snippet	math	blue-flower	2020-10-22T20:24:30+03:00

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