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Mathematica > Core Language > Tuning & Debugging > Symbol Handling >

Mathematica > Core Language > Package Development > Namespace Management > Symbol Handling >

Built-in Mathematica Symbol

Remove

Remove[symbol₁, ...]
removes symbols completely, so that their names are no longer recognized by Mathematica.

Remove["form₁", "form₂", ...]
removes all symbols whose names match any of the string patterns form_i.

You can use Remove to get rid of symbols that you do not need, and which may shadow symbols in contexts later on your context path.

	*	match zero or more characters
	@	match one or more characters, but not uppercase letters

Once you have removed a symbol, you will never be able to refer to it again, unless you recreate it.

If you have an expression that contains a symbol which you remove, the removed symbol will be printed as Removed["name"], where its name is given in a string.

Remove all symbols in a given context:

Specify symbols to remove as string patterns:

If a symbol from a package is used before the package is loaded, an extra symbol is created:

The extra symbol should be removed:

Only the correct symbol from the package remains:

If a symbol is removed, all of its properties and definitions are removed as well:

Using the same symbol again creates a new one without any of its old properties:

ClearAll also removes all properties and definitions, but leaves the symbol intact:

If an expression still refers to a removed symbol, those places are denoted with Removed:

Protected symbols cannot be removed:

Use Unprotect to remove protected symbols: