Page Visits Funnel project

I am working on the Page Visits Funnel project in R. Step 3 says"how long is the visits data frame?" I interpreted this to mean “how many rows”. When I coded that and hit save, nothing happened. So I checked the hint which says: " Use nrows() to find out the number of rows in a data frame." so I coded it this way:

total_visits <- visits %>%
	nrows()

and also this way:
total_visits <- nrows(visits)
Neither solution produces a result upon saving. What is the error, please?

I’ve also tried:

total_visits <- visits_cart %>%
nrows()
head(total_visits)

This didn’t seem to work, either.

It’s nrow() not nrows().

Also I suggest that you put the nrow in the inspection area.

Sorry, I also have a question about this project.
I´m trying to find the answer for step 5.
What percent of users who visited Cool T-Shirts Inc. ended up not placing a t-shirt in their cart?
I hope you can help me.
Thanks!