Variables in Swift Playground Quiz

What is a variable in Swift?

• A value that can be changed

• A value that is constant

How do you declare a variable in Swift?

• Using the keyword "let"

• Using the keyword "var"

What is the keyword used to declare a constant in Swift?

• let

• var

What is the data type of the variable "age: Int" in Swift?

• String

• Integer

What is the value of a variable "name" after the following code in Swift: "var name = "John""?

• "John"

• "Jane"

In Swift, can you change the data type of a variable once it's declared?

• Yes

• No

What is the symbol used for concatenating strings in Swift?

• +

• &

What is the value of a variable "temperature" after the following code in Swift: "var temperature = 98.6"?

• 98.6

• "98.6"

What is the keyword used to define a variable without providing a value in Swift?

• nil

• Optional

In Swift, can you use emojis as variable names?

• Yes

• No