Exploring Swift Basics

Grace wants to greet her classmates in Swift. Which code should she use to print a friendly message?

• echo 'Hello, World!'

• System.out.println('Hello, World!')

• print('Hello World!')

• print("Hello, World!")

Elijah and Lily are building a cool Swift app together! They need to store the number of apples they collected. Which basic data type should they use for whole numbers in Swift?

• String

• Int

• Float

• Double

James and Ava are having a debate in class. James says the result of the Boolean expression true && false is true, while Ava disagrees. Who is correct? What is the result of the expression?

• false

• true

• true || false

• false && true

Emma wants to make sure her favorite number never changes in her Swift code. Which of the following is the correct way for Emma to declare a constant?

• define constantName = value

• const constantName = value

• let constantName = value

• var constantName = value

Arjun wants to create a list of his favorite numbers in Swift. Which of the following is the correct way for Arjun to create an array of integers?

• let arrayName = [1, 2, 3]

• let arrayName = Int[]

• var arrayName = [Int]{}

• let arrayName = new Array()

Henry, David, and Mason are learning Swift together. They come across the forEach function and wonder what it does. Can you help them figure it out?

• The forEach function runs some code for each element in a collection.

• The forEach function filters elements based on a condition.

• The forEach function sorts elements in a collection.

• The forEach function returns a new collection of elements.

Aiden is learning Swift and wants to show the value of his variable myVariable on the screen. Which line of code should Aiden use to print it out?

• print(myVariable)

• display(myVariable)

• echo myVariable

• log(myVariable)

Sophia and Noah are building a calculator app in Swift. They want to store decimal numbers like 3.14. Which basic data type should they use?

• Float

• Int

• Double

• String

Ava and Zoe are having a friendly debate. Ava says that 5 is greater than 3, while Zoe isn't so sure. What is the result of the Boolean expression 5 > 3?

• 3 >= 5

• 5 < 3

• true

• false

Aria wants to store her favorite number in Swift. Which of the following is the correct way for her to declare a variable?

• let variableName = value

• const variableName: Type = value

• var variableName: Type = value

• variableName: Type = value;