Do you want to ask the user for input at the command line, using a slick 1980’s hacker movie prompt like this: >>?

Don’t use gets.chomp. Use readline instead:

require 'readline'
Readline.readline(">>")

…will output:

>> I can write stuff here

Use Readline.readline(). That’s what irb uses for user input.

Don’t use gets.chomp.

You’re coding some Ruby. You use gets.chomp to get user input. You run your ruby file. You type some text at the prompt. Looks good, right? But then you press the left arrow key and… ^[[D appears on the screen. WTF is that?