returning undefined from readFile
<p>I'm trying to get the following code to work:</p>

<pre><code>'use strict';

var fs = require('fs');

var fileName = 'readme.txt';
var str = fs.readFile(fileName, 'utf8', function (err, data) {
    if (err) {
        console.log(err);
        throw err;
    }
    return data;
});

console.log('result read: ' + str);
</code></pre>

<p>readme.txt:</p>

<pre><code>console.log('working');
</code></pre>

<p>I'm trying to display the following:</p>

<pre><code>result read: console.log('working');
</code></pre>