Spot the error

This Swift code contains one error – can you select the line that is incorrect?

Tip: You should mentally run the code from top to bottom, meaning that if line 3 says an integer should be returned and line 10 tries to return a string, line 10 is the wrong one.

func sectionForPage(pageNumber: Int) > String {

    var output: String = "Turning to page \(pageNumber)..."

    if pageNumber < 10 {

        output += "The title is Introduction"

    } else if pageNumber < 20 {

        output += "The title is Reviews"

    } else if pageNumber < 30 {

        output += "The title is Features"

    } else {

        output += "The title is Tutorials"

    return output

print(sectionForPage(pageNumber: 11))