A Valid Argument

In our continuing saga into functions, which is one of the foundational aspects of JavaScript, I want to address arguments. Note that this topic also applies to other languages, but other languages might use different terminology, such as methods and parameters. That is a somewhat semantic argument, but if you are coming from a classical OOP language, I want to be on the same page with you.

So…arguments…not the kind you have between a Mac and Windows guy…I am talking about the arguments of a function. Arguments are data (I know…bad grammar). That is what they are. Arguments are data that get passed to a function. Why would you want to do this? This allows functions to receive data from somewhere and then manipulate that data within the function. Let’s review function

[code lang=”js”]
// Declare function with function keyword
// Name your function
// Encase proper syntax of parentheses & curly braces
function foobar() {
// Write some code here
}
[/code]

Now that we have reviewed function syntax, where do arguments come into the picture? You pass an argument to the function utilizing the parentheses. Here is the syntax…

[code lang=”js”]
// Pass an argument (myArg1) to the function
function foobar(myArg1) {
// Write some code here
}
[/code]

The aforementioned syntax allows us to pass data to the function for the function to use. Let’s look at a simple example of how this works…

[code lang=”js”]
function funcAddFive(myNum1) {
// take argument and perform math problem
var sum = myNum1 + 5;
return sum;
}
// Call function and pass argument
// After this runs, myNum should equal 13
var myNum = funcAddFive(8);
[/code]

As you can see we can pass the data to our function and the function can then work its magic, so to speak, and use the passed data argument to complete its assigned task. I know there is some other stuff going on there that I have not covered in a post yet (return keyword and assigning a function to a variable), but I plan on covering those in the future. The main point I want you to walk away with is that you can pass data, called arguments, to functions and work with that data.

Happy Coding!

Clay Hess

More To Explore

computer, laptop, work place-2982270.jpg
Code

Unlocking Wireless Communication: A Dive into the Bluetooth API

Wireless communication has become an integral part of our daily lives, and Bluetooth technology is at the forefront of this revolution, enabling devices to exchange data over short distances and creating a world more interconnected than ever before. At the heart of this technology lies the Bluetooth Application Programming Interface (API), a powerful tool for developers looking to harness the capabilities of Bluetooth in their applications. In this blog post, we’ll explore what the Bluetooth API is, how it works, and the possibilities it opens up for innovation in wireless communication.

lighthouse, beacon, atlantic-8578318.jpg
Code

Understanding the Beacon API: Simplifying Asynchronous Data Transfers

In today’s data-driven world, web applications often need to send data back to the server. Traditionally, this has been done using AJAX requests or similar methods. However, these techniques can come with a cost, especially when dealing with data that needs to be sent during the unload phase of a document, such as tracking and diagnostic data. This is where the Beacon API shines by allowing developers to send data to a server more reliably and efficiently.

Share This Post

small_c_popup.png

Need help?

Let's have a chat...


Login

Jump Back In!

Here at Webolution Designs, we love to learn. This includes sharing things we have learned with you. 

Register

Begin Your Learning Journey Today!

Come back inside to continue your learning journey.