I found some css code which is using 
.move.up{
//css goes here
}
something like this. Can anyone tell me what type of selector it is in css..??
I found some css code which is using 
.move.up{
//css goes here
}
something like this. Can anyone tell me what type of selector it is in css..??
 
    
    It just describes a element with a class move that also has the class up-
<div class="move up"> <- Selected 
<div class="up move"> <- selected
<div class="up"> <- Not selected
<div class="move"> <- Not selected
<div class="move something up"> <- selected
Sample: http://jsfiddle.net/3gkmf3rx/1/
 
    
    It just selects elements with the classes "move" and "up". http://www.w3schools.com/cssref/css_selectors.asp
div{
  width: 60px;
  height: 60px;
  background: beige;
  border: solid black;
  float:left;
  margin: 10px;
  text-align: center;
  line-height: 60px;
  font-family: arial;
  font-weight: bold;
}
.separator{
  width: 5px;
  height: 60px;
  border: solid black;
  background: grey;
  clear: both;
}
.move.up{
  background: green;
}
//Additional knowledge
.class1 .class2{
  background: orange;
}
span div{
  background: purple;
}
.class3, .class4{
  background: brown;
}<div class="separator"></div>
<div class="move">
  1
  </div>
<div class="up">
  2  
</div>
<div class="move up">
  3
</div>
<div class="move classyclass up">
  4
</div>
<div class="separator"></div>
<!-- Additional knowledge :) -->
<div class="class1">
  5
  </div>
<div class="class2">
  6
  </div>
<div class="class1 class2">
  7
  </div>
<div class="class1 classyclass class2">
  8
  </div>
<span>
  <div>8.1</div>
</span>
<div class="separator"></div>
<div class="class3">
  9
  </div>
<div class="class4">
  10
  </div>
<div class="class3 class4">
  11
  </div>
<div class="class3 classyclass class4">
  12
  </div>