Am getting funny result from this following loop

Please can anyone help a rookie.I have been trying to learn abou loops and diid a little experiment but its returning that one of my variables is undefined.

Here is the code below

var c:Array=[“doh”,“re”,“mi”,“fa”,“so”,“la”,“ti”,“do”];
for(var i:Number=0;i<c.length;i++){

trace(“notes “+c*+” available”);
result+=c*+ newline;
t_txt.text=result;

}

on the output panel flash is writting undefinrd just before “doh”, like “undefineddoh”