What is the difference between Gemfile and Gemfile.lock in Ruby on Rails

What is the difference between Gemfile and Gemfile.lock in Ruby on Rails

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ruby-on-rails

bundle install returns "Could not locate Gemfile"

ruby-on-rails installation bundle gemfile

ruby-on-rails

Gem::LoadError for mysql2 gem, but it's already in Gemfile

ruby-on-rails mysql2 gemfile

ruby-on-rails

Meaning of new block "git_source(:github)" in Gemfile

ruby-on-rails bundler gemfile

ruby-on-rails

What does the ~> symbol mean in a bundler Gemfile? [duplicate]

ruby-on-rails bundler gemfile

ruby-on-rails

What is the use of Gemfile in rails?

ruby-on-rails ruby gemfile

ruby-on-rails

How to find unused gems in my Gemfile

ruby-on-rails gemfile

ruby-on-rails

Troubles with git and Gemfile.lock

ruby-on-rails git gemfile merge-conflict-resolution gemfile.lock

ruby-on-rails

Understanding Gemfile.lock: Is it okay to delete Gemfile.lock then run bundle install again?

ruby-on-rails ruby-on-rails-3 rubygems gemfile

ruby-on-rails

What is the difference between "~> 4.0.1", "4.0.1" and no version specifier in a Gemfile? [duplicate]

ruby-on-rails ruby gem gemfile

ruby-on-rails

Rails: Your user account isn't allowed to install to the system RubyGems

ruby-on-rails ruby rubygems bundler gemfile

ruby-on-rails

An error occurred while installing debugger-linecache (1.1.1), and Bundler cannot continue

ruby-on-rails ruby gem gemfile

ruby-on-rails

Does the order of gems in your Gemfile make a difference?

ruby-on-rails ruby gemfile

ruby-on-rails

Is It A Bad Practice to List Ruby Version in Both Gemfile and .ruby-version Dotfile?

ruby-on-rails ruby gemfile convention dotfiles

ruby-on-rails

Bundler cannot find a version of a gem, but gem install with the same name works

ruby-on-rails bundler gemfile

ruby-on-rails