var s = ["aaaa","xxxx","aqqqq","qddfv"];


    for(var i = 0; i < s.length;i++){
      console.log(s[i]);
    };



    var i = 0;

    while(i<s.length){
      console.log(s[i]);
      i++;
    };


for(var i in s){
  console.log(s[i]);
};