>
<pre class="language-dart"><code>'Dart ' 'is ' 'fun!';    // 'Dart is fun!'
</code></pre>
<p>You can use <code>${}</code> to interpolate the value of Dart expressions
within strings. The curly braces can be omitted when evaluating identifiers:</p>
<pre class="language-dart"><code>string = 'dartlang';
'$string has ${string.length} letters'; // 'dartlang has 8 letters'
</code></pre>
<p>A string is represented by a sequence of Unicode UTF-16 code units
accessible through the <a href="dart-core/String/codeUni