Closures using number parameters

Question

Edit - it is the $0 > $1 which i dont understand
Assuming i have the below code:

var numbers = [20, 19, 7, 12]

And i create a closure

numbers.map({
(number: Int) -> Int in
var result = 0
If number % 2 == 1 {
result = 0 * number
}
else is number % 2 == 0 {
result = 3 * number
}
Return result
)}

Can someone please explain how the number parameters works in the below after sorted

Let sortedNumbers = numbers.sorted { $0 > $1 }
Print(sortedNumbers)

Answer 1

I understand the dollar signs now
These are taking the default arguments and would go up corresponding to how many arugments there are.