What should I do if I need a javascript runtime environment?
I'm reading books on JavaScript programming, and I need an environment like Python's IDLE to type JavaScript commands into and then see the results like you would in IDLE. Is there an environment where you can do such a thing?
Regarding the javascript runtime environment, any of the major browsers (IE, FireFox, Chrome, Safari, etc..) will execute and display the results of JavaScript code that you put into it. You can open the developer console in Chrome and in IE using F12 and in Firefox using Ctrl+Shift+K. Alternatively you can simply put it into a .html file.