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TypeScript - round with precision up-to n decimal places
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In this article, we would like to show you how to round with precision up-to n decimal places in TypeScript.
In this example, we create a custom function that uses Math.pow() and Math.ceil() methods to round with precision up-to n decimal places.
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function ceilPrecised(number: number, precision: number): number {2
var power = Math.pow(10, precision);3
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return Math.ceil(number * power) / power;5
}6
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// Examples:8
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console.log( ceilPrecised( 5 , 0 ) ); // 510
console.log( ceilPrecised( 5. , 0 ) ); // 511
console.log( ceilPrecised( .5, 0 ) ); // 112
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console.log( ceilPrecised( 1.1234, 0 ) ); // 214
console.log( ceilPrecised( 1.1234, 1 ) ); // 1.215
console.log( ceilPrecised( 1.1235, 2 ) ); // 1.1316
console.log( ceilPrecised( 1.1235, 3 ) ); // 1.12417
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console.log( ceilPrecised( -1.1234, 0 ) ); // -119
console.log( ceilPrecised( -1.1234, 1 ) ); // -1.120
console.log( ceilPrecised( -1.1234, 2 ) ); // -1.1221
console.log( ceilPrecised( -1.1234, 3 ) ); // -1.12322
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console.log( ceilPrecised( 1234, -1 ) ); // 124024
console.log( ceilPrecised( 1234, -2 ) ); // 130025
console.log( ceilPrecised( 1234, -3 ) ); // 200026
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console.log( ceilPrecised( 5_000.000_001, 0 ) ); // 500128
console.log( ceilPrecised( 5_000.000_001, 6 ) ); // 5000.00000129
console.log( ceilPrecised( 5_000.000_001, -3 ) ); // 6000Output:
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52
53
14
5
26
1.27
1.138
1.1249
10
-111
-1.112
-1.1213
-1.12314
15
124016
130017
200018
19
500120
5000.00000121
6000