Angular2 material selection

Question

I am learning angular2 with its material design. I use the md-select module for material and have code

 <md-select>
    <md-option value="1">1</md-option>
    <md-option value="2">2</md-option>
    <md-option value="3">3</md-option>
    <md-option value="4">4</md-option>
  </md-select>

But I

I am using this documentation

Answer 1

You do not have parentheses around the "value", it should be:

...<md-option [value]="1">1</md-option>...