Turning off a section of code in html with something like an if statement

I have a live site and I have to keep working on it on a live site, which means I am viewing the page a lot.

I am wondering if there is a way of using like an if statement in HTML that I can turn off the google analytic's code so it doesn't mess up our reports? So I can simply change a value on the page (like a TRUE/FALSE) so I can work on it to my hearts content and I don't ruin the analytics.