Home Web Front-end JS Tutorial Mathematical functions in Javascript_Basic knowledge

Mathematical functions in Javascript_Basic knowledge

May 16, 2016 pm 07:15 PM

In Javascript, mathematical methods can be divided into the following categories:
constants, power functions, trigonometic functions, rounding functions, random numbers Number)

Constant and power functions

Math.E 自然对数的底(为常数) 2.718
Math.LN10 10的自然对数 2.302
Math.LN2 2的自然对数 0.693
Math.PI 圆周率 3.1415
Math.SQRT1_2 1/2的平方根 0.707
Math.SQRT2 2的平方根 1.414
Math.sqrt(x) X的平方根 更X的值有关
Math.pow(x, n) 返回x的n次方的数值 参数为x和n
Math.log(n) 返回n的自然对数 参数为n
Math.exp(n) 返回e的n次方的数值 参数为n

Trigonometric functions

Math.cos(x) X的余弦函数
Math.sin(x) X的正弦函数
Math.tan(x) X的正切函数
Math.acos(y) X的反余弦函数
Math.asin(y) X的反正弦函数
Math.atan(y) X的反正切函数

Note here: The units of the parameter x and the return value of the inverse function are all in radians (for example, PI radians = 180 degrees)

Rounding functions and random numbers

Math.random() 产生从0到1的随机数
Math.round(x) 取最接近整数x的数值
Math.floor(x) 取最接近整数x并且比x小的数值
Math.ceil(x) 取最接近整数x并且比x大的数值
Math.min(a, b, c) 返回参数列表中最小的数值
Math.max(a, b, c) 返回参数列表中最大的数值
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

What should I do if I encounter garbled code printing for front-end thermal paper receipts? What should I do if I encounter garbled code printing for front-end thermal paper receipts? Apr 04, 2025 pm 02:42 PM

Frequently Asked Questions and Solutions for Front-end Thermal Paper Ticket Printing In Front-end Development, Ticket Printing is a common requirement. However, many developers are implementing...

Who gets paid more Python or JavaScript? Who gets paid more Python or JavaScript? Apr 04, 2025 am 12:09 AM

There is no absolute salary for Python and JavaScript developers, depending on skills and industry needs. 1. Python may be paid more in data science and machine learning. 2. JavaScript has great demand in front-end and full-stack development, and its salary is also considerable. 3. Influencing factors include experience, geographical location, company size and specific skills.

How to merge array elements with the same ID into one object using JavaScript? How to merge array elements with the same ID into one object using JavaScript? Apr 04, 2025 pm 05:09 PM

How to merge array elements with the same ID into one object in JavaScript? When processing data, we often encounter the need to have the same ID...

Demystifying JavaScript: What It Does and Why It Matters Demystifying JavaScript: What It Does and Why It Matters Apr 09, 2025 am 12:07 AM

JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.

The difference in console.log output result: Why are the two calls different? The difference in console.log output result: Why are the two calls different? Apr 04, 2025 pm 05:12 PM

In-depth discussion of the root causes of the difference in console.log output. This article will analyze the differences in the output results of console.log function in a piece of code and explain the reasons behind it. �...

How to achieve parallax scrolling and element animation effects, like Shiseido's official website?
or:
How can we achieve the animation effect accompanied by page scrolling like Shiseido's official website? How to achieve parallax scrolling and element animation effects, like Shiseido's official website? or: How can we achieve the animation effect accompanied by page scrolling like Shiseido's official website? Apr 04, 2025 pm 05:36 PM

Discussion on the realization of parallax scrolling and element animation effects in this article will explore how to achieve similar to Shiseido official website (https://www.shiseido.co.jp/sb/wonderland/)...

Can PowerPoint run JavaScript? Can PowerPoint run JavaScript? Apr 01, 2025 pm 05:17 PM

JavaScript can be run in PowerPoint, and can be implemented by calling external JavaScript files or embedding HTML files through VBA. 1. To use VBA to call JavaScript files, you need to enable macros and have VBA programming knowledge. 2. Embed HTML files containing JavaScript, which are simple and easy to use but are subject to security restrictions. Advantages include extended functions and flexibility, while disadvantages involve security, compatibility and complexity. In practice, attention should be paid to security, compatibility, performance and user experience.

Is JavaScript hard to learn? Is JavaScript hard to learn? Apr 03, 2025 am 12:20 AM

Learning JavaScript is not difficult, but it is challenging. 1) Understand basic concepts such as variables, data types, functions, etc. 2) Master asynchronous programming and implement it through event loops. 3) Use DOM operations and Promise to handle asynchronous requests. 4) Avoid common mistakes and use debugging techniques. 5) Optimize performance and follow best practices.

See all articles