Check if all text inputs are empty, show alert with for if/else statement?

beginner here. I'm trying to use a conditional to check whether if the text inputs have been filled out, otherwise if empty, prompt an alert but it doesn't appear to do anything? Is my JS poorly laid out? Here is my jsfiddle. http://ift.tt/2t5KeYs

Thank you!!

<div>
    <label for="cand1">Candidate 1</label>
    <input class="candidate" id="cand1" placeholder="Candidate">
</div>

<div>
    <label for="cand2">Candidate 2</label>
    <input class="candidate" id="cand2" placeholder="Candidate">
</div>

<div>
    <label for="cand3">Candidate 3</label>
    <input class="candidate" id="cand3" placeholder="Candidate">
</div>

The JS

function candidateNames() {
   var inputs = document.getElementsByTagName("input");
   var result = [];
 for ( var i = 0; i < inputs.length; i += 1 ) {
   result[i] = inputs[i].value;

  if (inputs === '' || null || 0) {
      alert('Need to fill inputs');
  }  
}
  document.getElementById("candidateName1").innerHTML = result[0];
  document.getElementById("candidateName2").innerHTML = result[1];
  document.getElementById("candidateName3").innerHTML = result[2];
}