var sayHi = function () { var text = "Hello "; for (var i in arguments) { text += arguments[i] + ' '; } return text } var text1 = sayHi("JavaScript"); var text2 = sayHi("나에요", 43, '남자'); document.getElementById('demo1').innerText = text1; document.getElementById('demo2').innerText = text2;
<p id="demo1"></p> <p id="demo2"></p>