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SOLUTIONS
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Mathematica Session History
The history of an interactive Mathematica computation is both maintained in a fully editable Mathematica notebook and stored symbolically in a sequence of In and Out objects that can immediately be used in other Mathematica commands.
ReferenceReference
Out (%, %%, %n, ...) — output expressions
In — unevaluated input expressions
InString — original input strings
MessageList — messages produced while generating each output
ShowCellLabel ▪ CellLabelAutoDelete
Ctrl+L — copy down an input line (Insert ► Input from Above)
Ctrl+Shift+L — copy down an output line (Insert ► Output from Above)
InputForm — show output, graphics, etc. in input form
$Line — resettable current line number
$HistoryLength — number of previous outputs to keep
$OutputSizeLimit — maximum size of output to give explicitly
Cell ► Notebook History — summarize the editing history of a notebook
Saving Session History Information
Save — save definitions for symbols, functions, or contexts
Put, PutAppend — save Mathematica expressions
