The ability to generate pseudorandom numbers is important for simulating events, estimating probabilities and other quantities, making randomized assignments or selections, ...
$TemporaryDirectory gives the main system directory for temporary files on your computer system.
BoxBaselineShift is an option for AdjustmentBox that specifies how much the baseline of the box should be shifted relative to those of neighboring characters.
Some integer functions. The remainder on dividing 17 by 3. The integer part of 17/3.
MBOX
(Mathematica Import/Export Format) Unix mailbox format. Holds a collection of electronic mail messages. Native archive format of email clients such as Unix mail, Eudora, Mozilla, Netscape, and Thunderbird. ...
Introduction General String Patterns Regular Expressions
PrivatePaths -> {opt_1 -> val_1, opt_2 -> val_2, ...} is a global option that specifies settings for paths private to the notebook front end.
Mathematica has a wide coverage of named functions defined by sums and recurrence relations. Often using original algorithms developed at Wolfram Research, Mathematica ...
FileNameSplit["filename"] splits a file name into a list of parts.