In-Class Kotlin Exercise 1

Exercise · Explain This Kotlin Function (User Status)

Kotlin · Beginner

Explain this code out loud like you're speaking during a technical interview. Focus on the function, parameter, Boolean condition, if/else logic, and returned value.

fun getUserStatus(isOnline: Boolean): String {
    if (isOnline) {
        return "User is online"
    } else {
        return "User is offline"
    }
}

fun main() {
    println(getUserStatus(true))
}

🎯 Instructions oral task

Explain what the function does.
Describe what the parameter represents.
Explain what a Boolean value is.
Explain how the if/else statement works.
Explain what gets printed to the console.

📖 Vocabulary core

function — reusable block of code that performs a task.
parameter — input value passed into a function.
Boolean — data type that can be true or false.
condition — a rule or check that controls what happens next.
if/else statement — logic that chooses between two possible paths.
return value — value sent back from a function.
console output — text displayed on the screen.

🧩 Collocations natural English

define a function
pass in a Boolean value
check a condition
return a string
execute a block of code
print the result

🗣️ Phrasal Verbs interview speech

pass in — “We pass in a Boolean value to the function.”
check for — “The function checks for whether the user is online.”
go through — “The program goes through the if/else logic.”
print out — “The program prints out the final user status.”

🎤 Model Answer spoken

This Kotlin function is called getUserStatus. It takes one parameter called isOnline, which is a Boolean value. That means it can only be true or false.

Inside the function, there is an if/else statement. If isOnline is true, the function returns the string "User is online".

If isOnline is false, the function returns the string "User is offline". So the function chooses a message based on the user's online status.

In the main function, we call getUserStatus(true). Since the value is true, the program prints User is online to the console.