JavaScript - convert a string of numbers to an array of numbers

In this article, we would like to show you how to convert a string of numbers to an array of numbers in JavaScript.

Quick solution (ES6):

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const string = '1,2,3,4';

​

const result = string.split(',').map((item) => parseInt(item, 10));

​

console.log(result); // [ 1, 2, 3, 4 ]

In this example, we use split() method to split string into an array of strings by a comma separator (','). Then we use map() method with parseInt() to convert the array of strings into an array of numbers.

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var string = '1,2,3,4';

​

var result = string.split(',').map(function(item) {

    return parseInt(item, 10);

});

​

console.log(result);           // [ 1, 2, 3, 4 ]

console.log(typeof result[0]); // number

1. JavaScript - get all numbers in string and push them to array

1. String.prototype.split() - JavaScript | MDN
2. Array.prototype.map() - JavaScript | MDN
3. parseInt() - JavaScript | MDN