title: Angular Material slide toggle component is null by default
body: <p>I am building an Angular app in which I am using the <code>md-slide-toggle</code> component in my form validation.</p>
  
  <p>On the <code>onSubmit</code> method, when I log the value to the console, it logs null by default. How do I assign the <code>md-toggle-slide</code>'s value to be false by default?</p>
  
  <pre class="lang-html prettyprint-override"><code>&lt;form #formtest="ngForm" (ngSubmit)="onSubmit(formtest.value)"&gt;
  
      &lt;div class="form-group" *ngFor="let temp of value"&gt;
      &lt;md-slide-toggle [checked]="isChecked" color="primary" name={{temp}} ngModel&gt; {{temp}}&lt;/md-slide-toggle&gt;
      &lt;/div&gt;
      &lt;button md-raised-button type="submit"&gt;Check&lt;/button&gt;
    &lt;/form&gt;
  </code></pre>