A Javascript function groups a combination of statements together and makes your code reusable. Functions can also be applied to math problems, such as finding the sum of a group of numbers or solving for distance in an equation. The majority of work will be contained in functions while the main program is just handling input and output. Every Javascript function is the same in that they all are passed zero or more pieces of information, have a name, and, normally, return a value. Excel functions, on the other hand, will return a value no matter what. There are a few extra steps when writing functions in Javascript. They require more parentheses as well as brackets. Similar to variables, we can’t just name, or define, our function and leave it like that. It needs to be called. Normally, the function call is the name of the function, followed by more parentheses–for example, sayHello() . By officially calling the function, it tells Javascript to execute the code.
Reader Interactions
Comments
Leave a Reply
You must be logged in to post a comment.
Hi Madeline! I enjoyed reading your post! You clearly explained Javascript functions, what they do, what they mean, and how to input it! This is a great way to explain functions! Good job.
Hi Madeline,
I think it’s so important that you mentioned functions need to be called to be executed. You could write a bunch of different functions, but if they are not called in the program, they will never be executed. I think it’s also interesting to note that we can call functions within other functions. If I write a function within another function, as long as the compiler recognizes the first function before the second is called, it will run as directed. Even if we don’t called the function in the main code, since it is being called inside another function that is being called, it will run inside the called function.
Your post was very informative. JavaScript reminds me of excel and how we input data to then run outputs or calculations.