<!doctype html>
<html>
<head>
<tltle> 함수 </title>
<script>
var inputNum;
function printStar(){
inputNum = parseInt(prompt("정수를 입력하세요 : "));
if(isNaN(inputNum) == true){
document.write("입력 오류 입니다");
return;
}
for(var i = 0; i < inputNum; i++){
for(var o = 0; o <= i; o++){
document.write("*");
}
document.write("<br>");
}
}
</script>
</head>
<body>
<h3> 함수 </h3>
<hr>
<script>
printStar();
</script>
</body>
</html>
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