IRB for interactive exploration in Ruby - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does IRB stand for in Ruby?

IRB stands for Interactive Ruby Shell. It lets you write and test Ruby code quickly in a command-line environment.

beginner

How do you start IRB in your terminal?

You start IRB by typing irb in your terminal and pressing Enter. This opens an interactive Ruby session.

beginner

What is the main benefit of using IRB for Ruby programming?

IRB lets you try out Ruby code instantly without creating a file. It's great for learning, testing ideas, and debugging.

beginner

How can you exit the IRB session?

You can exit IRB by typing exit or pressing Ctrl + D in the terminal.

beginner

Can you define variables and run methods inside IRB?

Yes! IRB works like a mini Ruby program where you can define variables, write methods, and see results immediately.

What command starts an IRB session?

A irb

B ruby start

C run irb

D ruby shell

Typing irb in the terminal starts the Interactive Ruby Shell.

How do you exit IRB?

A quit

B stop

C exit or Ctrl + D

D end

You can type exit or press Ctrl + D to leave IRB.

Which of these is NOT a feature of IRB?

A Create and save Ruby files automatically

B Test small code snippets quickly

C Define variables and methods interactively

D Instantly run Ruby code

IRB does not save files automatically; it is for interactive code testing only.

Why is IRB useful for beginners?

A It compiles Ruby code into machine language

B It lets you try Ruby code without writing a full program

C It creates graphical user interfaces

D It manages Ruby project dependencies

IRB allows beginners to experiment with Ruby code quickly and easily.

What happens when you type Ruby code in IRB?

A The code is saved to a file

B The code is ignored

C The code is sent to a server

D The code runs immediately and shows the result

IRB runs your Ruby code instantly and displays the output right away.

Explain what IRB is and how it helps when learning Ruby.

Think about how you can try code without making a file.

Describe the steps to start and exit an IRB session.

Focus on the commands you type in the terminal.