Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript Basics (Retired) Creating Reusable Code with Functions Giving Information to Functions

Posted by baderbouta
baderbouta
7,804 Points

Kinda' confused.

Hey,

I was wondering, why did Mark use an 'upper' argument when he constructed the function but then when he called that same function he actually used an 'integer'?

function getRandomNumber(upper) {
  var randomNumber = Math.floor(Math.random() * upper) + 1;
  return randomNumber;
}

console.log(getRandomNumber(7));
console.log(getRandomNumber(304));
console.log(getRandomNumber(345));
console.log(getRandomNumber(45546));

1 Answer

Jahanzeb Khan
Jahanzeb Khan
226 Points
Jahanzeb Khan
Jahanzeb Khan
226 Points

you can name upper anything its just an argument. you can change it to abc, integer etc they are just variables in the function scope. The below code will also work fine for you.

function getRandomNumber(integer) { var randomNumber = Math.floor(Math.random() * integer) + 1; return randomNumber; }

baderbouta
baderbouta
7,804 Points

Thank you Jahan, I've just learned that they are just 'placeholders' for the arguments (which are called parameters), thank you.

Jahanzeb Khan
Jahanzeb Khan
226 Points
Jahanzeb Khan
Jahanzeb Khan
226 Points

Yes, that is better phrasing for this. Thanks for letting me know.