Languages
[Edit]
EN

JavaScript - Math.ceil() method example

2 points
Created by:
FryerTuck
649

The Math.ceil() function returns an integer value that is greater than or equal to the argument - the result of the round-up operation. 

// ONLINE-RUNNER:browser;

console.log( Math.ceil(  5     ) ); //  5

console.log( Math.ceil(  2.49  ) ); //  3
console.log( Math.ceil(  2.50  ) ); //  3
console.log( Math.ceil(  2.51  ) ); //  3

console.log( Math.ceil( -2.49  ) ); // -2
console.log( Math.ceil( -2.50  ) ); // -2
console.log( Math.ceil( -2.51  ) ); // -2

console.log( Math.ceil(  0.999 ) ); //  1
console.log( Math.ceil(  1.001 ) ); //  2
console.log( Math.ceil( -1.001 ) ); // -1

1. Documentation

SyntaxMath.ceil(number)
Parametersnumber - integer or float number value (primitive value).
Result

Rounded up number value (primitive value).

If input number value is equal to NaN it returns NaN.

If input  number value is equal to -Infinity it returns -Infinity.

If input  number value is equal to +Infinity it returns +Infinity.

Descriptionceil is a static method that takes only one parameter and returns rounded-up value.

2. Rounding with precision up-to n places example

// ONLINE-RUNNER:browser;

function ceilPrecised(number, precision) {
	var power = Math.pow(10, precision);
  	return Math.ceil(number * power) / power;
}

// Example:

console.log( ceilPrecised(     5  ,  0 ) ); // 5
console.log( ceilPrecised(     5. ,  0 ) ); // 5
console.log( ceilPrecised(      .5,  0 ) ); // 1

console.log( ceilPrecised(  1.1234,  0 ) ); // 2
console.log( ceilPrecised(  1.1234,  1 ) ); // 1.2
console.log( ceilPrecised(  1.1235,  2 ) ); // 1.13
console.log( ceilPrecised(  1.1235,  3 ) ); // 1.124

console.log( ceilPrecised( -1.1234,  0 ) ); // -1
console.log( ceilPrecised( -1.1234,  1 ) ); // -1.1
console.log( ceilPrecised( -1.1234,  2 ) ); // -1.12
console.log( ceilPrecised( -1.1234,  3 ) ); // -1.123
 
console.log( ceilPrecised(    1234, -1 ) ); // 1240
console.log( ceilPrecised(    1234, -2 ) ); // 1300
console.log( ceilPrecised(    1234, -3 ) ); // 2000

console.log( ceilPrecised(  5_000.000_001,  0 ) ); // 5001
console.log( ceilPrecised(  5_000.000_001,  6 ) ); // 5000.000001
console.log( ceilPrecised(  5_000.000_001, -3 ) ); // 6000

References

  1. Floor and ceiling functions - Wikipedia

Alternative titles

  1. JavaScript - Math.ceil() documentation with examples
  2. js - Math.ceil() method documentation with examples
Donate to Dirask
Our content is created by volunteers - like Wikipedia. If you think, the things we do are good, donate us. Thanks!
Join to our subscribers to be up to date with content, news and offers.

Cross technology - Math.ceil()

Native Advertising
🚀
Get your tech brand or product in front of software developers.
For more information Contact us
Dirask - we help you to
solve coding problems.
Ask question.

❤️💻 🙂

Join