Question

How to calculate the next multiple of 4 in JavaScript

Answer 1

function next_multiple_of_4(num) { 
    return (num % 4 === 0) ? num + 4 : (num + 3) & ~0x03; 
} 

let nums = [21, 16, 0, -9]; 

nums.forEach(num => { 
    console.log(next_multiple_of_4(num)); 
});


 
/*
run:
 
24
20
4
-8

*/

 

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Answer 2

function next_multiple_of_4(num) { 
    return num + (4 - num % 4)
} 

let nums = [21, 16, 0, -9]; 

nums.forEach(num => { 
    console.log(next_multiple_of_4(num)); 
});


 
/*
run:
 
24
20
4
-4

*/

 

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