Clear
(Built-in Mathematica Symbol) Clear[symbol_1, symbol_2, ...] clears values and definitions for the symbol_i. Clear["form_1", "form_2", ...] clears values and definitions for all symbols whose names match ...
Clear
(Mathematica Front End Token) "Clear" is a front end token that deletes a selection without copying it to the clipboard.
BitClear[n, k] sets to 0 the bit corresponding to the coefficient of 2^k in the integer n.
When you set a value to a symbol, that value will be used for the symbol for the entire Mathematica session. Since symbols no longer in use can introduce unexpected errors ...
Clear deletes a selection without pasting it to the clipboard.
ClearSystemCache[] clears internal system caches of stored results.
ClearAll[symb_1, symb_2, ...] clears all values, definitions, attributes, messages, and defaults associated with symbols. ClearAll["form_1 ", "form_2", ...] clears all ...
Clear Formatting removes formatting from selected text or cells.
ClearAttributes[s, attr] removes attr from the list of attributes of the symbol s.
"ClearCellOptions" is a front end token that removes all explicit option settings for a cell.