I am brand new to JavaScript and I would like practice my skills using a simple windows based IDE. While learning I do not want to use any CSS or HTML. I would like if possible to have colour single stepping, highlighting and syntax checking.

So for example you could type in your function(s), call it and receive the result

function squareNumber(x) {

  return x*x;

}



squareNumber(5)



25

I would like something better than the Internet Explorer console.