If as an expression returning value in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to assign the maximum of two numbers to max using if as an expression.

Kotlin

val max = if (a > b) [1] else b

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A0

Bb

Ca + b

Da

Attempts:

3 left

💡 Hint

Common Mistakes

Using b instead of a in the true branch.

Trying to use if as a statement without returning a value.

The if expression returns a if a is greater than b, otherwise b.

2fill in blank

medium

Complete the code to assign a message based on the number using if as an expression.

Kotlin

val message = if (num % 2 == 0) [1] else "Odd number"

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A"Positive"

B"Number"

C"Even number"

D"Zero"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the string.

Returning the wrong message for even numbers.

The if expression returns "Even number" if num is divisible by 2, otherwise "Odd number".

3fill in blank

hard

Fix the error in the code by completing the if expression to return the correct value.

Kotlin

val result = if (score >= 50) [1] else "Fail"

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APass

B"Pass"

Ctrue

D50

Attempts:

3 left

💡 Hint

Common Mistakes

Returning Pass without quotes causing a compile error.

Returning a boolean or number instead of a string.

The if expression must return a string value. "Pass" is the correct string to return when score is 50 or more.

4fill in blank

hard

Fill both blanks to create a variable that holds a description based on age using if as an expression.

Kotlin

val description = if (age [1] 18) [2] else "Adult"

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A<

B"Minor"

C>=

D"Child"

Attempts:

3 left

💡 Hint

Common Mistakes

Using >= instead of < for the condition.

Returning "Child" instead of "Minor".

The condition checks if age is less than 18. If true, it returns "Minor", otherwise "Adult".

5fill in blank

hard

Fill all three blanks to create a variable that returns a grade description based on score using if as an expression.

Kotlin

val grade = if (score [1] 90) [2] else if (score [3] 60) "Fail" else "Pass"

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

A>=

B"Excellent"

C<

D"Good"

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up comparison operators.

Returning wrong strings for the conditions.

The first condition checks if score is 90 or more and returns "Excellent". The second condition checks if score is less than 60 and returns "Fail", otherwise "Pass".