ult is the overflowed value:</p>

<pre><code class="language-swift">var x: Int8 = 21
x &amp;-= 10
// x == 11
var y: UInt8 = 10
y &amp;-= 21
// y == 245 (after overflow)</code></pre>

<p><strong>Parameters:</strong>
  <strong>lhs:</strong> A numeric value.
  <strong>rhs:</strong> The value to subtract from <code>lhs</code>.</p>

    <h4>Declaration</h4>    
    <code class="language-swift">func &amp;-=(lhs: inout Self, rhs: Self)</code>
    
        <h4>Declared In</h4>
        <a href="../../protocol/FixedW