title: What is the purpose of data as a parameter in fs.readFile?
body: <p>Why is data required as a parameter in fs.readFile function?</p>
  <pre><code>const fs = require('fs');
  
  fs.readFile('./SampleFile.txt', function read(err, data) {
      if (err) {
          throw err;
      }
      const content = data;
  
          console.log(content);  
      
  });
  </code></pre>