How to run Ruby code from terminal?

Question

I need to run a few lines of Ruby code from terminal, but I can\'t find the needed parameter for it.

Can you explain how to do this?

Answer 1

You can run ruby commands in one line with the -e flag:

ruby -e "puts 'hi'"

Check the man page for more information.

Answer 2

If Ruby is installed, then

ruby yourfile.rb

where yourfile.rb is the file containing the ruby code.

Or

irb

to start the interactive Ruby environment, where you can type lines of code and see the results immediately.