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Asked: 2026-05-27T02:20:18+00:00

In MATLAB there is the function clear to delete all current variables. This is

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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 earlier calculations. I’m searching something similar for Mathematica now, but I couldn’t find anything except of Clear[VAR] which removes only the variable VAR.

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  1. Editorial Team

    I recommend one of two methods:

    1. Keyboard shortcut to Quit[] the kernel

    There is a system file KeyEventTranslations.tr that you can edit to customize keyboard shortcuts. I, as others, have added Ctrl+Q to Quit[] the kernel, allowing for a rapid clearing of all sessions variables. For more information on setting this up, see:

    2. Give the new Notebook a unique context

    In Mathematica, the current $Context defines what Context unqualified symbol names belong to. By giving a new Notebook a unique Context, which is easily done through the Evaluation menu, the symbols used in that Notebook will not collide with unqualified symbols in other Notebooks. See the following question for more detailed information:

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