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              <h1>Christmas Tree Loop JavaScript, by Dan Guinn</h1>
<p>This example was inspired by an example provided in Eloquent JavaScript called "Looping a Triangle".</p>
<p>I used this illustration to help my students see some of the problem solving process one might use.</p>
    
<div id="ChristmasTree"></div>

            
          
!
            
              body{
        background-color: #fff;
        color:green;
      }
            
          
!
            
              var ChristmasTree = document.getElementById("ChristmasTree");
        var hash="#";
        var output="";
        var limit=30; //Must be even number to get a star!
        var middle=limit/2;
        for(i=0; i<middle; i++){
          for(j=0; j<limit; j++){
            if(j==middle){
        		if(i==0){
        			output +="*";
        		}else{
        			output +="#";
        		}
            }else{

              if(j>=(middle-i) && j<=(middle+i) ){
                  output +="#";
              }else{
                  output +="&nbsp;&nbsp;";
              }
            }

          }
          //console.log(output);
          ChristmasTree.innerHTML +=output + "<br>";
          output=""; //reset
        }

            
          
!
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