How do I pop up an alert in Javascript?

Question

How do I pop up an alert in Javascript?

I tried alert\"HELLO\" but that didn\'t work.

Can someone tell me the correct syntax?

Oh by the

Answer 1

There are a few ways.

1. Use your web browser, type this code in address bar.

   javascript:alert("Hello World!")

2. Open web developer in your web browser, go to console and type:

   alert("Hello World!")

3. Type the code in .html or .js code as shown in other answers above.