title: What is "p" in Ruby?
body: <p>I'm sure it's a silly question to those who know, but I can't find an explanation of what it does or what it is.</p>
  
  <pre><code>CSV.open('data.csv', 'r') do |row|
    p row
  end
  </code></pre>
  
  <p>What does "<code>p row</code>" do?</p>