<!DOCTYPE html>
<html>
<head>
<title>JavaScript</title>
<script>
var a = ["Sanjay", "Aman", "Rehman"];
document.write(a + "<br><br>");
var b = Array.isArray(a);
document.write(b);
</script>
</head>
<body>
</body>
</html>
isArray() with if condition
<!DOCTYPE html>
<html>
<head>
<title>JavaScript</title>
<script>
var a = ["Sanjay", "Aman", "Rehman"];
if(Array.isArray(a)){
document.write("This is an Array");
}else{
document.write("This is not an Array");
}
</script>
</head>
<body>
</body>
</html>