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iOS Swift Functions and Optionals Functions Syntax and Parameters

Jake N
Jake N
612 Points

confused

im not sure where to start with this one

parameters.swift
func greeting(person) {
    println("Hello")
}

2 Answers

Chris Shaw
Chris Shaw
26,662 Points

Hi Jake,

Let's break this down into each task.

Task 1

Modify the function named greeting to accept a parameter. Name the parameter person which is of type String.

So what this is saying is we need to declare a parameter called person and assign it the type String which we can do by putting a colon between our parameter name and the type.

func greeting(person: String) {
  println("Hello")
}
Task 2

Modify the println statement within the greeting function to use the variable person. For example, if you pass a person named "Tom" to the function then it should display: Hello Tom. (Hint: you must use string interpolation).

If you remember from the introduction to Swift course we saw interpolation in action which is the use of \() inside a string literal, all we need to do is pass person into it.

func greeting(person: String) {
  println("Hello \(person)")
}
Task 3

Call the function greeting and pass it the string "Tom".

Finally we just need to call our greeting function and supply it with the string Tom as the parameter.

func greeting(person: String) {
  println("Hello \(person)")
}

greeting("Tom")
Jake N
Jake N
612 Points

ah okay thanks