print hello world in javascript

var msg = "hello world";
console.log(msg);

// Output Hello World! in the console.
console.log("Hello World!");

console.log("Hello World!");

I would do something like this:

<script>
  alert("Hello World!");
</script>

console.log("Hello, World!");

console.error("Error, World!"); // For errors

console.warn("Warning, World!"); // For warnings

console.clear(); // To clear the console

alert("Hello world");