From bbad456a499a1006cff7a521934a86b13c2a6b2a Mon Sep 17 00:00:00 2001 From: Angelos Chalaris Date: Mon, 1 Jan 2018 16:23:58 +0200 Subject: [PATCH] Update sumPower.md --- snippets/sumPower.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/snippets/sumPower.md b/snippets/sumPower.md index 7721c3747..27c4d5130 100644 --- a/snippets/sumPower.md +++ b/snippets/sumPower.md @@ -1,6 +1,6 @@ ### sumPower -Returns the sum of the powers of all the numbers from `start` to `end`. +Returns the sum of the powers of all the numbers from `start` to `end` (both inclusive). Use `Array.fill()` to create an array of all the numbers in the target range, `Array.map()` and the exponent operator (`**`) to raise them to `power` and `Array.reduce()` to add them together. Omit the second argument, `power`, to use a default power of `2`. @@ -8,7 +8,7 @@ Omit the third argument, `start`, to use a default starting value of `1`. ```js const sumPower = (end,power = 2,start = 1) => - Array(end - start).fill(0).map((x,i) => (i+start) ** power).reduce((a,b) => a+b,0) + Array(end + 1 - start).fill(0).map((x,i) => (i+start) ** power).reduce((a,b) => a+b,0) ``` ```js