icating whether every element of a sequence
satisfies a given predicate.</p>

<p><strong><code>predicate</code>:</strong>  A closure that takes an element of the sequence
  as its argument and returns a Boolean value that indicates whether
  the passed element satisfies a condition.
<strong>Returns:</strong> <code>true</code> if the sequence contains only elements that satisfy
  <code>predicate</code>; otherwise, <code>false</code>.</p>

    <h4>Declaration</h4>    
    <code class="language-swift">func all