index,html
<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF8">
<title>JavaScriptの勉強</title>
</head>
<body>
<h1>JavaScriptの勉強</h1>
<script>
// ループ (while)
var i = 0;
while (i < 10) {
console.log(i);
i++;
}
</script>
</body>
</html>