NotebookPrint[expr] sends a notebook containing expr to your default printer.NotebookPrint[notebook] sends the specified notebook to your default printer. ...

NotebookSelection[] represents the current selection in the current evaluation notebook in the front end.NotebookSelection[nb] represents the current selection associated ...

expr //. rules repeatedly performs replacements until expr no longer changes.

Return[expr] returns the value expr from a function. Return[] returns the value Null.

SymbolName[symbol] gives the name of the specified symbol.

TableDirections is an option for TableForm and MatrixForm which specifies whether successive dimensions should be arranged as rows or columns.

ValueQ[expr] gives True if a value has been defined for expr, and gives False otherwise.

There are many situations where one wants to find a formula that best fits a given set of data. One way to do this in Mathematica is to use Fit. Basic linear fitting. Here is ...

When you see a two-dimensional expression on the screen, you can edit it much as you would edit text. You can for example place your cursor somewhere and start typing. Or you ...

In doing calculations, it is often convenient to collect together several objects, and treat them as a single entity. Lists give you a way to make collections of objects in ...