Kotlin REPL and script mode - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Kotlin REPL?

Kotlin REPL is a Read-Eval-Print Loop. It lets you write and run Kotlin code line by line in an interactive way, like chatting with the computer.

beginner

How do you start Kotlin REPL from the command line?

You type kotlinc and press Enter. This opens the Kotlin REPL where you can type Kotlin code directly.

beginner

What is Kotlin script mode used for?

Kotlin script mode lets you write Kotlin code in a file with .kts extension and run it without compiling. It's good for quick tasks and automation.

beginner

How do you run a Kotlin script file named hello.kts?

You run kotlin hello.kts in the command line. This executes the script without creating a separate program.

intermediate

What is the main difference between Kotlin REPL and script mode?

REPL runs code interactively line by line, great for testing ideas quickly. Script mode runs a whole Kotlin file as a script, useful for small programs or automation.

What does REPL stand for in Kotlin?

A Run-Evaluate-Process Loop

B Run-Execute-Program Language

C Read-Eval-Print Loop

D Read-Edit-Print Language

REPL means Read-Eval-Print Loop, which lets you type code and see results immediately.

Which command starts the Kotlin REPL?

A kotlinc

B kotlin run

C kotlin script

D kotlinc -script

Typing kotlinc starts the Kotlin REPL for interactive coding.

What file extension is used for Kotlin script files?

A .kt

B .kotlin

C .script

D .kts

Kotlin scripts use the .kts extension.

How do you run a Kotlin script file named test.kts?

A kotlin test.kts

B kotlinc -script test.kts

C kotlinc test.kts

D kotlin -script test.kts

Use kotlin test.kts to run a Kotlin script file.

Which mode is best for quickly testing small pieces of Kotlin code?

A Script mode

B REPL

C Compiled mode

D Debug mode

REPL is best for quick, interactive testing of Kotlin code.

Explain how Kotlin REPL helps beginners learn Kotlin.

Think about how typing code line by line and seeing results helps learning.

Describe the steps to run a Kotlin script file from the command line.

Focus on the file type and the command used.