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JavaScript - Math.ceil() method example
2
points
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
| Syntax | Math.ceil(number) |
| Parameters | number - integer or float number value (primitive value). |
| Result |
Rounded up If input If input If input |
| Description | ceil 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