Ruby: Print Version String from Script

By Xah Lee. Date: . Last updated: .

Print version from the command line:

ruby -v

Print version from within a script:

# -*- coding: utf-8 -*-
# Ruby

p RUBY_VERSION # "2.3.7"

Printing version from script is a important technique to find out which version your script is running. Because, you might have several version installed, and and it's harder to find out in terminal, because there are aliases, links, path environment variables, etc effect which Ruby version will start when you type ruby in shell.

Ruby Version Release Dates

Ruby Version Release Dates

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  1. Ruby Basics
  2. Doc Lookup
  3. Print Version String
  4. Unicode 💎
  5. Quote String
  6. Quote Long String
  7. Format String
  8. String Operations
  9. True, False
  10. If Then Else
  11. Loop
  12. List
  13. Loop Thru List
  14. Hash Table
  15. Function Optional Parameter
  16. Map f to List
  17. Complex Numbers
  18. Intro to Reading Ruby Doc: What's M, C, ::, # ?
  19. Predefined Global Variables
  20. What's RVM, Gem, Rake, Bundler, RDoc, ri, irb?