JavaScript: int to string

Javascript Int String

Every built-in JavaScript object type has a toString() method. This method is automatically called when the object needs to be represented as a string value (i.e., when you concatenate some string value with a number), or it can be called manually when such a type conversion is wanted.

The toString() method works on all of the standard JS objects: arrays, dates, numbers, errors, et cetera. For number types, the toString() method also can take an optional “radix” argument: number.toString(radix)

The radix (or base) is the total number of unique digits, including zero, that are used to represent a particular number system. For number systems other than the decimal system, you can use the radix argument to correctly stringify a number from some other number system, such as the octal (base 8) and hexadecimal (base 16) number systems.

Here are some examples of the toString() method being used on numbers:

var x = 10; // integer number
var y = 7.950; // floating point number
var z = 1.21e–6; // floating point number in a scientific notation
var inf = Number.POSITIVE_INFINITY; // infinity

console.log(‘hello’ + x); // 'hello10' - toString() is called automatically
console.log(x.toString()); // “10” - decimal base
console.log(x.toString(2)); // “1010” - binary base
console.log(x.toString(8)); // “12” - octal base
console.log(x.toString(16)); // “a” - hex base

console.log(y.toString()); // “7.95” - note the stripped “0” at the end
console.log(y.toString(2)); // “111.11110011001100111000011100010110000010010101011011”
console.log(y.toString(16)); // “7.f33387160956c”

console.log(z.toString()); // “0.00000121”

console.log(inf.toString()); // “Infinity”
console.log(inf.toString(2)); // “Infinity”

There isn’t really much more to using toString() on numbers in JavaScript. As always, if you have any questions, ask away in a comment below.

Advertiser Disclosure

HostingAdvice.com is a free online resource that offers valuable content and comparison services to users. To keep this resource 100% free, we receive compensation from many of the offers listed on the site. Along with key review factors, this compensation may impact how and where products appear across the site (including, for example, the order in which they appear). HostingAdvice.com does not include the entire universe of available offers. Editorial opinions expressed on the site are strictly our own and are not provided, endorsed, or approved by advertisers.

Our Editorial Review Policy

Our site is committed to publishing independent, accurate content guided by strict editorial guidelines. Before articles and reviews are published on our site, they undergo a thorough review process performed by a team of independent editors and subject-matter experts to ensure the content’s accuracy, timeliness, and impartiality. Our editorial team is separate and independent of our site’s advertisers, and the opinions they express on our site are their own. To read more about our team members and their editorial backgrounds, please visit our site’s About page.