Yacas-specific constants

(directly go to documentation on : %, True, False, EndOfFile. )

# 25. Yacas-specific constants

% | previous result
True | boolean constant representing true
False | boolean constant representing false
EndOfFile | end-of-file marker

###

% -- previous result

##### Internal function

##### Calling format:

    %

##### Description:

`%` evaluates to the previous result on the command line. `%` is a global variable that is bound to the previous result from the command line. Using `%` will evaluate the previous result. (This uses the functionality offered by the `SetGlobalLazyVariable` command).

Typical examples are `Simplify(%)` and `PrettyForm(%)` to simplify and show the result in a nice form respectively.

##### Examples:

    In> Taylor(x,0,5)Sin(x)
    Out> x-x^3/6+x^5/120;
    In> PrettyForm(%)

         3    5
        x    x
    x - -- + ---
        6    120

##### See also:

SetGlobalLazyVariable .

###

True -- boolean constant representing true

###

False -- boolean constant representing false

##### Internal function

##### Calling format:

    True
    False

##### Description:

`True` and `False` are typically a result of boolean expressions such as `2 < 3` or `True And False`.

##### See also:

And , Or , Not .

###

EndOfFile -- end-of-file marker

##### Internal function

##### Calling format:

    EndOfFile

##### Description:

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.