Constants
%
% evaluates to the previous result on the command line. % is a global
variable that is bound to the previous result from the command line.
To actually evaluate the previous result, call Eval(%). This will generally not be needed, so using % in places where the
result is needed will suffice.
Typical examples are Simplify(%) and PrettyForm(%)to simplify and show the result in a nice
form respectively.
True and False
True and False are typically the result
of boolean expressions like 2 < 3 and True And False.
EndOfFile
EndOfFile : End of file marker when reading from file. If a file
contains the expression EndOfFile; the
operation will stop reading the file at that point.
Infinity
Infinity represents infinity. It can be the result of certain
calculations.
Note that for most analytic functions Yacas understands Infinity.
Thus Infinity*2 will return Infinity, and a < Infinity will evaluate to True.
Pi
Pi represents the value of pi. When the N(..) function is used,
Pi is set to the correct value. It is probably better to use
Pi than Pi(), for simplification purposes.