- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Finding sum of every nth element of array in JavaScript
We are required to write a JavaScript function that takes in an array of numbers and returns the cumulative sum of every number present at the index that is a multiple of n from the array.
Example
The code for this will be −
const arr = [5, 3, 5, 6, 12, 5, 65, 3, 2]; const num = 3; const nthSum = (arr, num) => { let sum = 0; for(let i = 0; i < arr.length; i++){ if(i % num !== 0){ continue; }; sum += arr[i]; }; return sum; }; console.log(nthSum(arr, num));
Output
The output in the console −
76
Advertisements