When with multiple conditions in Kotlin - Mini Project: Build & Apply

Using When with Multiple Conditions in Kotlin

📖 Scenario: You are creating a simple program to categorize a day of the week into different types based on the day name.

🎯 Goal: Build a Kotlin program that uses a when expression with multiple conditions to print the type of day.

📋 What You'll Learn

Create a variable called day with the exact value "Tuesday".

Create a variable called weekendDays that holds the days "Saturday" and "Sunday".

Use a when expression with multiple conditions combined using commas to check if day is a weekend day or a weekday.

Print the exact output based on the when result.

💡 Why This Matters

🌍 Real World

Categorizing days helps apps show different content or behavior on weekends versus weekdays, like special offers or schedules.

💼 Career

Understanding how to use <code>when</code> with multiple conditions is important for writing clear and concise Kotlin code in Android apps and backend services.

1

Create the day variable

Create a variable called day and set it to the string "Tuesday".

Kotlin

# Create a variable called day and set it to "Tuesday"
# Your code here

Need a hint?

Use val day = "Tuesday" to create the variable.

2

Create the weekendDays list

Create a variable called weekendDays and set it to a list containing the strings "Saturday" and "Sunday".

Kotlin

val day = "Tuesday"
# Create a list called weekendDays with "Saturday" and "Sunday"
# Your code here

Need a hint?

Use listOf("Saturday", "Sunday") to create the list.

3

Use when with multiple conditions

Write a when expression using day to check if it matches "Saturday" or "Sunday" in one branch, and "Monday", "Tuesday", "Wednesday", "Thursday", or "Friday" in another branch. Use commas to separate multiple conditions in each branch. Assign the result to a variable called dayType with the value "Weekend" or "Weekday" accordingly. Use else to assign "Unknown".

Kotlin

val day = "Tuesday"
val weekendDays = listOf("Saturday", "Sunday")
# Use when with multiple conditions separated by commas to assign "Weekend", "Weekday", or "Unknown" to dayType
# Your code here

Need a hint?

Use commas to list multiple days in each when branch.

4

Print the dayType

Write a println statement to print the value of the variable dayType.

Kotlin

val day = "Tuesday"
val weekendDays = listOf("Saturday", "Sunday")

val dayType = when(day) {
    "Saturday", "Sunday" -> "Weekend"
    "Monday", "Tuesday", "Wednesday", "Thursday", "Friday" -> "Weekday"
    else -> "Unknown"
}
# Print the dayType variable
# Your code here

Need a hint?

Use println(dayType) to print the result.