title: Is there a way to clear everything before starting in Mathematica?
body: <p>In MATLAB there is the function <em>clear</em> to delete all current variables. This is very useful if you start something totally new and don't want to get conflicts with earlier calculations. I'm searching something similar for Mathematica now, but I couldn't find anything except of <em>Clear[VAR]</em> which removes only the variable <em>VAR</em>.</p>