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Measuring the Length of a String in JavaScript, with Examples

In this guide, we explain how to measure the length of a string in JavaScript using the length method.

JavaScript is a flexible programming language that runs just about everywhere. You can run JavaScript apps in web browsers, build command-line apps you can run in the terminal, mobile apps can be built using platforms like Cordova, and server processes can be written on platforms like Node.js.

Naturally, Linux is the environment of choice for many JavaScript developers and is perfect for learning tools like Node.js as well as hosting them for end users once completed.

JavaScript Strings

JavaScript strings are primitive variables, one of the basic types of variables used for storing text. A string is a sequence of characters only, and should not be used for storing numbers or complex objects, but things like names, addresses, and phone numbers.

Finding Out the Length of a String

var name = "Billy Smith"; 
console.log(name.length) // Returns 11

Note that:

  • Every character is counted – including spaces!
  • If the string value is “”, its length will be 0


Reading a string’s length may seem trivial, but it’s very useful. For example, you might need to check that the user has entered only a short name and not a paragraph of text, or want to check whether the user has forgotten to enter their name at all.

To learn more about other JavaScript statements and functions, check out other articles!

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I'm Brad, and I'm nearing 20 years of experience with Linux. I've worked in just about every IT role there is before taking the leap into software development. Currently, I'm building desktop and web-based solutions with NodeJS and PHP hosted on Linux infrastructure. Visit my blog or find me on Twitter to see what I'm up to.

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