How do you use the Optional variable in a ternary conditional operator?

Question

I want to use an Optional variable with the ternary conditional operator but it is throwing error this error: optional cannot be used as boolean. What am I doing wrong?

Answer 1

Ternary operators operate on three targets. Like C, Swift has only one ternary operator, the ternary conditional operator (a ? b : c).

Example usage on tableView -

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
     return section == 2 ?  4 :  1
}

indicates if section equal to 2 then it return 4 otherwise 1 on false.