Is there a way to clear everything before starting in Mathematica?

Question

In MATLAB there is the function clear to delete all current variables. This is very useful if you start something totally new and don\'t want to get conflicts with earl

Answer 1

You can use ClearAll to clear the variables and their attributes in your Global context (default) like so:

ClearAll["Global`*"]

If you're working inside a different context (e.g., notebook specific context or cell group specific context), you can do

ClearAll[Evaluate[Context[] <> "*"]]

If you want to remove all symbols from the kernel so that Mathematica doesn't recognize them anymore, you can use Remove[] similar to the above two examples.

Barring these, you can always quit the kernel with Quit[] which will remove all symbols. A fresh kernel will be initiated the next time you evaluate something.