String templates and interpolation in Kotlin - Mini Project: Build & Apply

String templates and interpolation

📖 Scenario: You are creating a simple greeting card generator. The card will include a person's name and their favorite hobby.

🎯 Goal: Build a Kotlin program that uses string templates and interpolation to create personalized greeting messages.

📋 What You'll Learn

Create variables to hold a person's name and hobby

Create a greeting message using string templates with interpolation

Print the greeting message

💡 Why This Matters

🌍 Real World

String templates help create dynamic messages in apps, like personalized greetings or notifications.

💼 Career

Understanding string interpolation is essential for building user-friendly interfaces and readable code in Kotlin development.

1

Create variables for name and hobby

Create a variable called name and set it to the string "Alice". Create another variable called hobby and set it to the string "painting".

Kotlin

# Create variables 'name' and 'hobby' with the exact values
// Your code here

Need a hint?

Use val to create variables and assign the exact strings.

2

Create a greeting message using string templates

Create a variable called greeting that uses string templates to combine name and hobby into the message: "Hello, Alice! I heard you like painting."

Kotlin

val name = "Alice"
val hobby = "painting"
// Create 'greeting' using string templates
// Your code here

Need a hint?

Use $variableName inside the string to insert variable values.

3

Add a condition to change the greeting

Create a variable called isMorning and set it to true. Then create a variable called finalGreeting that uses string templates and if expression to say "Good morning, Alice! I heard you like painting." if isMorning is true, otherwise use the greeting variable.

Kotlin

val name = "Alice"
val hobby = "painting"
val greeting = "Hello, $name! I heard you like $hobby."
// Create 'isMorning' and 'finalGreeting' with condition
// Your code here

Need a hint?

Use if expression inside variable assignment to choose the message.

4

Print the final greeting message

Write a println statement to print the finalGreeting variable.

Kotlin

val name = "Alice"
val hobby = "painting"
val greeting = "Hello, $name! I heard you like $hobby."
val isMorning = true
val finalGreeting = if (isMorning) "Good morning, $name! I heard you like $hobby." else greeting
// Print the final greeting
// Your code here

Need a hint?

Use println(finalGreeting) to display the message.