SuspendPacket[] is a MathLink packet used for synchronization with the Mathematica kernel.
f /: lhs =. removes any rules defined for lhs, associated with the symbol f.
$DateStringFormat gives the default format to use for date strings generated by DateString.
Using Previous Results Defining Variables Values for Symbols
Running Mathematica Getting Started Working with the Notebook Interface
Notebook Interfaces Doing Computations in Notebooks Notebooks as Documents
The following simple commands allow you to test the installation of Mathematica. Running these commands does not guarantee that the installation was successful, but a failed ...
Type the expression that will have an overscript. Type x. Create an overscript by pressing the Control key and the 7 key at the same time.
Introduction Core Language Mathematics and Algorithms
Notebooks as Documents Entering Input in Notebooks Two–Dimensional Expression Input