Edit in JSFiddle

var person = {name:"남기용", job:"프로그래머" , age:43};

var text = "";
for (var prop in person) {
	text += prop + " : " + person[prop] + "<br>";
}
document.getElementById('for1').innerHTML = text;

var arr = ["딸기", "바나나", "사과", "오렌지", "포도" , "토마토"];
var target = document.getElementById('for2');
for (var i in arr) {
	target.innerHTML += i + ". "+ arr[i] + "<br>";
}

<div id="for1">

</div>

<p id="for2">

</p>