Arguments or parameters?
I have a hard time remembering the difference between two common programming terms: arguments, and parameters.
This simple inability leads to real insecurity when I speak with coworkers with more education and experience. Nothing inspires imposter syndrome in a more than not remembering the fundamentals!
Here is the difference between the two similar terms:
Arguments
Arguments are the data passed to a function. Think of something simple like console.log(). In order to get a message written to the console, you need to pass it some information.
console.log('One', 2, false, null)
Every bit of information that you pass to a function is an argument. In the above example, we are assigning four arguments to console.log(): "One", 2, false, and null.
Parameters
Parameters are the data that a function is expecting. Let’s say you have a function that takes two numbers and returns the sum. It will look something like this:
function sum(a, b) {
return a + b
}
The variables that a function is expecting are its parameters. In our sum() function, we are expecting two parameters: a, and b.
Remembering the difference
I’ve been wracking my brain for a mnemonic device for remembering the difference, but have yet to come up with a great one. In the meantime, this will have to do:
Arguments are data you assign to a function, while parameters are variables that the function is prepared to accept.
If I hear of or come up with a better one, I’ll update this article.
I hope that helps!