Hi, I'am learning how to compue property values dynamically on Day 10 's Struct -themed tutorials.

"https://www.hackingwithswift.com/quick-start/beginners/how-to-compute-property-values-dynamically"

I found it was confusing to decide when to use () and when to use "." , if I want to pass in a value to an instance or to a method.

Here is what Paul wrote :

struct Employee {
    let name: String
    var vacationAllocated = 14
    var vacationTaken = 0

    var vacationRemaining: Int {
        vacationAllocated - vacationTaken
    }
}
var archer = Employee(name: "Sterling Archer", vacationAllocated: 14)
archer.vacationTaken += 4
print(archer.vacationRemaining)
archer.vacationTaken += 4
print(archer.vacationRemaining)

when I tried to write it in my Playground, I mistakenly wrote

var archer = Employee(name: "Sterling Archer", vacationAllocated: 14)
archer (vacationTaken: 4)
print(archer.vacationRemaining)

Then I reliazed Paul used "." when calling out archer's vacationTaken property.

My question is: Is there a general rule about "When to use . and when to use ()" ?

Or we just need to remember where to use what ?

Thank you in advance

Boat