Bool type and logical operators in Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a Boolean variable set to true.

Swift

let isSunny: Bool = [1]

Drag options to blanks, or click blank then click option'

Atrue

BTrue

C1

D"true"

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase True instead of lowercase true

Using numbers like 1 instead of Boolean values

Using strings like "true" instead of Boolean literals

In Swift, Boolean values are lowercase true or false. Using true sets the variable to a Boolean true value.

2fill in blank

medium

Complete the code to check if both conditions are true using a logical AND operator.

Swift

let canGoOutside = isSunny [1] hasFreeTime

Drag options to blanks, or click blank then click option'

A||

B==

C&&

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using OR operator (||) instead of AND

Using equality (==) instead of logical operators

Using inequality (!=) instead of logical operators

The logical AND operator in Swift is &&. It returns true only if both sides are true.

3fill in blank

hard

Fix the error in the code by choosing the correct logical NOT operator.

Swift

let isRaining = false
let shouldTakeUmbrella = [1]isRaining

Drag options to blanks, or click blank then click option'

A!

Bnot

C~

D!!

Attempts:

3 left

💡 Hint

Common Mistakes

Using ~ which is a bitwise NOT, not logical NOT

Using 'not' which is not valid Swift syntax

Using double exclamation marks (!!) which is invalid

The logical NOT operator in Swift is !. It flips a Boolean value from true to false or vice versa.

4fill in blank

hard

Fill the blank to create a Boolean expression that is true if either it is weekend or you have no homework.

Swift

let canRelax = isWeekend [1] noHomework

Drag options to blanks, or click blank then click option'

A!=

B&&

C==

D||

Attempts:

3 left

💡 Hint

Common Mistakes

Using AND (&&) instead of OR

Using equality (==) or inequality (!=) operators incorrectly

The logical OR operator || returns true if at least one condition is true.

5fill in blank

hard

Fill all three blanks to create a Boolean expression that is true if the word's length is greater than 3 and the word is not empty.

Swift

let word = "apple"
let condition = (word.count [1] 3) [2] (word [3] "")

Drag options to blanks, or click blank then click option'

A>

B&&

C!=

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using == instead of != to check for non-empty string

Using || instead of && which changes logic

Using < instead of > for length comparison

This code checks if a word's length is greater than 3 and the word is not empty. The operators used are > for comparison, && for logical AND, and != for not equal.