Any type as universal base in Kotlin - Mini Project: Build & Apply

Using the Any Type as a Universal Base in Kotlin

📖 Scenario: You are building a simple Kotlin program that stores different types of items in a list. Since the items are of different types, you will use Kotlin's Any type, which can hold any kind of value.

🎯 Goal: Create a Kotlin program that uses the Any type as a universal base to store and print different types of values.

📋 What You'll Learn

Create a list called items that can hold values of any type

Add at least three different types of values to the items list

Create a variable called count to store the number of items

Use a for loop to print each item in the items list

💡 Why This Matters

🌍 Real World

In real apps, you often need to store or handle data of different types together. Kotlin's <code>Any</code> type lets you do this safely and easily.

💼 Career

Understanding <code>Any</code> helps you work with generic data, APIs, and collections that hold mixed types, which is common in software development.

1

Create a list with different types using Any

Create a list called items that holds these exact values: 42 (an integer), "Hello" (a string), and true (a boolean). Use the Any type for the list.

Kotlin

# Create a list called items with 42, "Hello", and true using Any type
# Your code here

Need a hint?

Use val items: List<Any> = listOf(42, "Hello", true) to create the list.

2

Add a variable to count the number of items

Create a variable called count and set it to the size of the items list.

Kotlin

val items: List = listOf(42, "Hello", true)
# Create a variable count that stores the size of items
# Your code here

Need a hint?

Use val count = items.size to get the number of items.

3

Use a for loop to print each item

Use a for loop with the variable item to go through items and print each item.

Kotlin

val items: List = listOf(42, "Hello", true)
val count = items.size
# Use a for loop to print each item in items
# Your code here

Need a hint?

Use for (item in items) { println(item) } to print each item.

4

Print the total count of items

Print the text "Total items: " followed by the value of count using a single println statement.

Kotlin

val items: List = listOf(42, "Hello", true)
val count = items.size
for (item in items) {
    println(item)
}
# Print the total count of items
# Your code here

Need a hint?

Use println("Total items: $count") to print the count.