Kotlin REPL and script mode - Mini Project: Build & Apply

Kotlin REPL and Script Mode Basics

📖 Scenario: You are learning how to quickly test Kotlin code snippets using the Kotlin REPL (Read-Eval-Print Loop) and how to write simple Kotlin scripts.

🎯 Goal: Build a simple Kotlin script that defines variables, uses a helper variable, performs a calculation, and prints the result. This will help you understand how Kotlin code runs interactively and as a script.

📋 What You'll Learn

Create variables with exact names and values

Add a helper variable for configuration

Use a calculation with the variables

Print the final result exactly

💡 Why This Matters

🌍 Real World

Kotlin REPL and script mode let you quickly test ideas and write small programs without setting up a full project.

💼 Career

Many Kotlin developers use REPL and scripts to prototype code, debug, or automate tasks efficiently.

1

Create initial variables

Create two variables called width and height with values 5 and 10 respectively.

Kotlin

// Create variables width and height with values 5 and 10
// Your code here

Need a hint?

Use val to create variables that do not change.

2

Add a helper variable

Add a variable called scale and set it to 2.

Kotlin

val width = 5
val height = 10
// Add a variable scale with value 2
// Your code here

Need a hint?

Use val scale = 2 to create the helper variable.

3

Calculate scaled area

Create a variable called scaledArea that multiplies width, height, and scale.

Kotlin

val width = 5
val height = 10
val scale = 2
// Calculate scaledArea by multiplying width, height, and scale
// Your code here

Need a hint?

Use the * operator to multiply the variables.

4

Print the scaled area

Print the value of scaledArea using println.

Kotlin

val width = 5
val height = 10
val scale = 2
val scaledArea = width * height * scale
// Print scaledArea
// Your code here

Need a hint?

Use println(scaledArea) to show the result.