gistfile1.txt

# Exercise3. Make use of the class Dir for the following -
# 
# Display your current working directory.
# Create a new directory tmp under your working directory.
# Change your working directory to tmp
# Display your current working directory.
# Go back to your original directory.
# Delete the tmp directory.

puts "1. #{ENV['PWD']}"
Dir.mkdir('tmp') unless Dir.exists?('tmp')
Dir.chdir("/tmp")
puts "2. #{ENV['PWD']}" # => not in tmp
Dir.chdir('..')
puts "3. #{ENV['PWD']}"
Dir.delete('tmp') # => Errno::EACCES: Permission denied - tmp