Question

How to round a number to a multiple of 8 in JavaScript

Answer 1

function roundToMultipleOf(number, roundTo) {
    return (number + (roundTo - 1)) & ~(roundTo - 1);
}

console.log(roundToMultipleOf(9, 8));
console.log(roundToMultipleOf(19, 8));
console.log(roundToMultipleOf(71, 8));



         
/*
run:
 
16
24
72
      
*/

 

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Answer 2

function roundToMultipleOf(number, multipleOf) {
    return multipleOf * Math.round(number / multipleOf);
}

console.log(roundToMultipleOf(9, 8));
console.log(roundToMultipleOf(19, 8));
console.log(roundToMultipleOf(71, 8));



         
/*
run:
 
8
16
72
      
*/

 

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