**func** printInstructorsname() {
	print("Sean Allen")
}

func printInstructors(name: String) {
    print(name)
}

printInstructors(name: "Sean Allen")

we added a variable with type inside the function.

func add(firstNumber: Int, to secondNumber: Int) -> Int {
    let sum = firstNumber + secondNumber
    return sum
}

print(add(firstNumber: 23, to: 32))

a function that takes two parameter (numbers), adds them and returns them

For return function to work define the data type.

with override functions there will always be use of super.