MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › Math › ceil
Math.ceil() - JavaScript | MDN
Math.ceil(-Infinity); // -Infinity Math.ceil(-7.004); // -7 Math.ceil(-4); // -4 Math.ceil(-0.95); // -0 Math.ceil(-0); // -0 Math.ceil(0); // 0 Math.ceil(0.95); // 1 Math.ceil(4); // 4 Math.ceil(7.004); // 8 Math.ceil(Infinity); // Infinity
W3Schools
w3schools.com › jsref › jsref_ceil.asp
JavaScript Math ceil() Method
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS DSA TYPESCRIPT ANGULAR ANGULARJS GIT POSTGRESQL MONGODB ASP AI R GO KOTLIN SWIFT SASS VUE GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE INTRO TO PROGRAMMING INTRO TO HTML & CSS BASH RUST ... Array[ ] Array( ) at() concat() constructor copyWithin() entries() every() fill() filter() find() findIndex() findLast() findLastIndex() flat() flatMap() forEach() from() includes() indexOf() isArray() join() keys() lastIndexOf() length map() of() pop() prototype push() reduce() reduceRight() rest (...) reverse() shift() slice() some() sort() splice() spread (...) toReversed() toSorted() toSpliced() toString() unshift() values() valueOf() with() JS Boolean
Videos
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How to Round Numbers Using Math in JavaScript | Math ...
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How to use Math Ceil Math Floor in a Button in JavaScript - YouTube
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How to implement JavaScript Math.ceil() Method - YouTube
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JavaScript for Beginners - Math.floor() & Math.ceil() - YouTube
00:50
JavaScript Math ceil() method - JavaScript Tutorial for Beginners
How to use Math.floor Method in JavaScript | Monika Szucs BCIT
Math.js
mathjs.org › docs › reference › functions › ceil.html
math.js | an extensive math library for JavaScript and Node.js
math.ceil(3.2) // returns number 4 math.ceil(3.8) // returns number 4 math.ceil(-4.2) // returns number -4 math.ceil(-4.7) // returns number -4 math.ceil(3.212, 2) // returns number 3.22 math.ceil(3.288, 2) // returns number 3.29 math.ceil(-4.212, 2) // returns number -4.21 math.ceil(-4.782, 2) // returns number -4.78 const c = math.complex(3.24, -2.71) math.ceil(c) // returns Complex 4 - 2i ... math.ceil(c, 1) // returns Complex 3.3 - 2.7i const unit = math.unit('3.241 cm') const cm = math.unit('cm') const mm = math.unit('mm') math.ceil(unit, 1, cm) // returns Unit 3.3 cm ... math.ceil(unit, 1, mm) // returns Unit 32.5 mm math.ceil([3.2, 3.8, -4.7]) // returns Array [4, 4, -4] math.ceil([3.21, 3.82, -4.71], 1) // returns Array [3.3, 3.9, -4.7] floor, fix, round ·
Programiz
programiz.com › javascript › library › math › ceil
JavaScript Math ceil()
// ceil() with string as argument let value = Math.ceil("JavaScript"); console.log(value); // Output: NaN
GeeksforGeeks
geeksforgeeks.org › javascript › javascript-math-ceil-function
JavaScript Math.ceil( ) function - GeeksforGeeks
September 9, 2024 - An empty array passed as a parameter returns NaN. Example 1: In this example, Math.ceil rounds a number up to the nearest integer.
TutorialsPoint
tutorialspoint.com › javascript › math_ceil.htm
JavaScript Math.ceil() Method
In this example, we are passing postive arguments to the Math.ceil() method − · <html> <body> <script> let number1 = Math.ceil(8.001); let number2 = Math.ceil(5); let number3 = Math.ceil(0.60); document.write(number1, "<br>", number2, "<br>", number3); </script> </body> </html>
TechOnTheNet
techonthenet.com › js › math_ceil.php
JavaScript: Math ceil() function
In JavaScript, the syntax for the ceil() function is: ... The number used to find the smallest integer. The ceil() function returns the smallest integer value that is greater than or equal to a number. Math is a placeholder object that contains mathematical functions and constants of which ...
GeeksforGeeks
geeksforgeeks.org › javascript › javascript-math-ceil-method
JavaScript Math ceil() Method - GeeksforGeeks
July 15, 2024 - The JavaScript Math.ceil method is used to return the smallest integer greater than or equal to a given number.
Codecademy
codecademy.com › forum_questions › 4f977513839b6d0003005464
2.1 Is there some reason no one uses Math.ceil? | Codecademy
You could use Math.ceil(Math.random() * 6) like you originally suggested, which would give you values between 1 and 6 most of the time, but there’d be a chance of getting a 0 every so often, and you probably don’t want that. ... In this SQL course, you'll learn how to manage large datasets and analyze real data using the standard data management language. Beginner Friendly.Beginner Friendly4 Lessons4 Lessons ... Learn how to use JavaScript — a powerful and flexible programming language for adding website interactivity.
LaunchCode
education.launchcode.org › intro-to-professional-web-dev › appendices › math-method-examples › ceilfloortrunc-examples.html
Math.ceil, floor, and trunc Examples — Introduction to Professional Web Development in JavaScript documentation
At first glance, Math.floor and Math.trunc appear to do exactly the same thing. However, a closer look shows that the two methods treat negative numbers differently. ... When combined with the map array method, ceil, floor, and trunc will operate on each entry in an array.
Scaler
scaler.com › home › topics › math ceil() javascript
Math ceil() JavaScript- Scaler Topics
June 22, 2022 - Math ceil in JavaScript returns the number that has been rounded by the upward rounding method or we can say that it returns the smallest integer greater than or equal to the given number.
Top answer 1 of 3
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as stated in MDN reference about Math.random()
Returns a floating-point, pseudo-random number in the range [0, 1) that is, from 0 (inclusive) up to but not including 1 (exclusive), which you can then scale to your desired range.
Since Math.random can return 0, then Math.ceil(Math.random()*10) could also return 0 and that value is out of your [1..10] range.
About your second question, see Most efficient way to create a zero filled JavaScript array?
2 of 3
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Math.floor() is preferred here because of the range of Math.random().
For instance, Math.random() * 10 gives a range of [0, 10). Using Math.floor() you will never get to the value of 10, whereas Math.ceil() may give 0.
SheCodes
shecodes.io › athena › 57990-what-does-match-ceil-in-javascript-do
[JavaScript] - What does match Ceil in Javascript do - | SheCodes
Learn how the Math.ceil() function works in JavaScript to round up to the nearest integer.
FlatCoding
flatcoding.com › home › javascript math ceil: round numbers with precision
JavaScript Math ceil: Round Numbers with Precision - FlatCoding
June 26, 2025 - It fits well in loops, arrays, and dynamic code. Yes. Math.ceil() always returns a whole number. It never gives a decimal. JavaScript tries to turn the value into a number. If it fails, it returns NaN.
Vultr Docs
docs.vultr.com › javascript › standard-library › Math › ceil
JavaScript Math ceil() - Round Up Value | Vultr Docs
November 29, 2024 - The Math.ceil() function in JavaScript is a versatile tool that helps round any given number up to the nearest integer. Its straightforward implementation and predictable behavior with floating-point numbers, negative values, zeros, integers, ...
GoLinuxCloud
golinuxcloud.com › home › javascript › how to use math.ceil in javascript? [solved]
How to use math.ceil in JavaScript? [SOLVED] | GoLinuxCloud
November 11, 2022 - number1 = 4.01; number2 = 3.98; number3 = 123.45; console.log(Math.ceil(number1)); console.log(Math.ceil(number2)); console.log(Math.ceil(number3)); ... As you can see regardless of how far (decimally) the number is from the higher (or next) ...
Educative
educative.io › answers › mathceil-mathfloor-and-mathround-in-javascript
Math.ceil, Math.floor, and Math.round in JavaScript
While the Math.ceil method returns the smallest integer greater than or equal to the value we pass, Math.floor returns the largest or equal integer that is less than the given value.
Sling Academy
slingacademy.com › article › applying-math-ceil-for-ceilings-in-array-indexing-with-javascript
Applying Math.ceil() for Ceilings in Array Indexing with JavaScript - Sling Academy
The Math.ceil() method in JavaScript rounds a number upwards to the nearest integer. If the number is already an integer, it simply returns that number. This method is particularly useful when dealing with calculations that result in decimal numbers but require an integer, such as index positions ...
Reintech
reintech.io › blog › implementing-math-ceil-method-javascript
Implementing the Math.ceil() Method | Reintech media
January 1, 2026 - The Math.ceil() method is a fundamental JavaScript function that rounds numbers upward to the nearest integer.
O'Reilly
oreilly.com › library › view › javascript-the-definitive › 0596101996 › re106.html
Math.ceil( ): round a number up — ECMAScript v1 - JavaScript: The Definitive Guide, 5th Edition [Book]
August 17, 2006 - The closest integer greater than or equal to x. Math.ceil( ) computes the ceiling function—i.e., it returns the closest integer value that is greater than or equal to the function argument.
Author David Flanagan
Published 2006
Pages 1018