In JavaScript, we can use loops or recursion to add n numbers. The specific implementation method is as follows:
1. Use a loop to add n numbers
1.1 for loop
Use a for loop to add each number . The sample code is as follows:
function sumByFor(n, arr) { var sum = 0; for (var i = 0; i <p>1.2 while loop</p><p>Use the while loop to add each number. The sample code is as follows: </p><pre class="brush:php;toolbar:false">function sumByWhile(n, arr) { var sum = 0, i = 0; while (i <p>2. Use recursion to find the sum of n numbers</p><p>Use recursion to add the sum of the first number and the remaining numbers. The sample code is as follows: </p><pre class="brush:php;toolbar:false">function sumByRecursion(n, arr) { if (n == 1) { return arr[0]; } else { return arr[0] + sumByRecursion(n-1, arr.slice(1)); } } var arr = [1, 2, 3, 4, 5]; console.log(sumByRecursion(arr.length, arr)); // 输出15
The above are the implementations of three methods for calculating the sum of n numbers in JavaScript. The method using loops is simpler and more intuitive, while the method using recursion is more beautiful. In actual development, appropriate methods should be selected based on needs and scenarios.
The above is the detailed content of How to calculate addition n in JavaScript. For more information, please follow other related articles on the PHP Chinese website!

The article discusses useEffect in React, a hook for managing side effects like data fetching and DOM manipulation in functional components. It explains usage, common side effects, and cleanup to prevent issues like memory leaks.

Lazy loading delays loading of content until needed, improving web performance and user experience by reducing initial load times and server load.

Higher-order functions in JavaScript enhance code conciseness, reusability, modularity, and performance through abstraction, common patterns, and optimization techniques.

The article discusses currying in JavaScript, a technique transforming multi-argument functions into single-argument function sequences. It explores currying's implementation, benefits like partial application, and practical uses, enhancing code read

The article explains React's reconciliation algorithm, which efficiently updates the DOM by comparing Virtual DOM trees. It discusses performance benefits, optimization techniques, and impacts on user experience.Character count: 159

The article explains useContext in React, which simplifies state management by avoiding prop drilling. It discusses benefits like centralized state and performance improvements through reduced re-renders.

Article discusses preventing default behavior in event handlers using preventDefault() method, its benefits like enhanced user experience, and potential issues like accessibility concerns.

The article discusses the advantages and disadvantages of controlled and uncontrolled components in React, focusing on aspects like predictability, performance, and use cases. It advises on factors to consider when choosing between them.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Dreamweaver CS6
Visual web development tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
