THIS IS DOCUMENTATION FOR AN OBSOLETE PRODUCT.
SEE THE DOCUMENTATION CENTER FOR THE LATEST INFORMATION.

DOCUMENTATION CENTER SEARCH

Mathematica > Core Language > Defining Variables and Functions > Attributes > Unprotect >

BUILT-IN MATHEMATICA SYMBOL

Unprotect

removes the attribute Protected for the symbols

unprotects all symbols whose names textually match any of the

A typical sequence in adding your own rules for built-in functions is Unprotect[f];definition;Protect[f].

Default behavior:

Unprotect and modify the definition:

New behavior:

Default behavior:

Out[1]=

Unprotect and modify the definition:

New behavior:

Out[5]=

Unprotect several symbols:

Unprotect all symbols in the current context:

Unprotect a system symbol to make a definition for it:

Restore protection:

Unprotect and clear all symbols in a package, to allow it to be read twice:

Unprotecting a symbol is equivalent to clearing the Protected attribute:

Unprotect returns the list of symbols actually unprotected:

To modify definitions of a protected symbol, unprotect it first:

To unprotect all symbols given in a variable, use Evaluate: