Boolean type and logical operators in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a Boolean variable named isSunny and assign it the value true.

Kotlin

val isSunny: Boolean = [1]

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

A"true"

B1

CTrue

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around true, which makes it a String instead of Boolean.

Using uppercase True, which is not valid in Kotlin.

The Boolean value true in Kotlin is lowercase without quotes. Quotes would make it a String.

2fill in blank

medium

Complete the code to check if isRaining is false using the logical NOT operator.

Kotlin

if ([1]isRaining) {
    println("No rain today!")
}

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

Anot

B~

C!

D!!

Attempts:

3 left

💡 Hint

Common Mistakes

Using not keyword which is not valid syntax in Kotlin.

Using ~ which is a bitwise operator, not logical NOT.

The logical NOT operator in Kotlin is ! placed before the Boolean variable.

3fill in blank

hard

Fix the error in the code to correctly combine two Boolean conditions with the AND operator.

Kotlin

if (isWeekend [1] isHoliday) {
    println("Day off!")
}

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

A&&

Band

C||

D&

Attempts:

3 left

💡 Hint

Common Mistakes

Using and keyword which is not a valid operator in Kotlin.

Using single & which is bitwise AND, not logical AND.

The logical AND operator in Kotlin is &&. Using and or single & is incorrect for Boolean logic.

4fill in blank

hard

Fill both blanks to create a Boolean expression that is true if isCold is true or isSnowing is true.

Kotlin

if (isCold [1] isSnowing) {
    println("Wear warm clothes!")
}

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

A&&

B||

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using && which requires both conditions to be true.

Using equality operators == or != which do not combine Boolean logic.

The logical OR operator in Kotlin is ||. It returns true if either condition is true.

5fill in blank

hard

Fill all three blanks to create a Boolean expression that is true only if isWeekend is true, isHoliday is false, and hasPlans is false.

Kotlin

if (isWeekend [1] !isHoliday [2] !hasPlans) {
    println("Free day to relax!")
}

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

A&&

B||

Attempts:

3 left

💡 Hint

Common Mistakes

Using OR || which makes the condition true if any one is true.

Mixing AND and OR operators incorrectly.

To ensure all conditions must be true, use the logical AND operator && between each condition.