Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops A Closer Look at Loop Conditions

Hubert Odias
Hubert Odias
1,898 Points

Hello i have a question on why he has var = randomNumber = getRandomNumber(upper) as a variable with a function.

Also i would like to know what the purpose of this variable is.

1 Answer

Steven Parker
Steven Parker
210,850 Points

Look again, there's only one "=" in that statement:

var randomNumber = getRandomNumber(upper);

This statement uses the "getRandomNumber" function to get a value to store into the new variable "randomNumber" that is created.

And the purpose of the variable is to store that random number so it can be compared to another one later to check for a match.

Hubert Odias
Hubert Odias
1,898 Points

So it’s storing the random number from the math.random expression to be compared with the correct number? couldnt we use a function expression with a variable consisting of the math.random syntax?

Steven Parker
Steven Parker
210,850 Points

You could, but it would be more verbose. And since the same thing will be done in more than one place in the program, creating a named function for it makes sense.