Asir - output

output(["filename"]): :: Writes the return values and prompt onto file filename.

Standard output stream of Asir is redirected to the specified file. While Asir is writing its outputs onto a file, no outputs, except for keyboard inputs and some of error messages, are written onto the standard output. (You cannot see the result on the display.)
To direct the Asir outputs to the standard output, issue the command without argument, i.e., output().
If the specified file already exists, new outputs will be added to the tail of the file. If not, a file is newly created and the outputs will be written onto the file.
When file name is specified without double quotes (""), or when protected file is specified, an error occurs and the system returns to the top level.
If you want to write inputs from the key board onto the file as well as Asir outputs, put command ctrl("echo",1), and then redirect the standard output to your desired file.
Contents which are written onto the standard error output, CPU time etc., are not written onto the file.
Reading and writing algebraic expressions which contain neither functional forms nor unknown coefficients (vtype() References) are performed more efficiently, with respect to both time and space, by bload() and bsave().
On Windows one has to use `/' as the separator of directory names.

[83] output("afo");
fctr(x^2-y^2);
print("afo");
output();
1
[87] quit;
% cat afo
1
[84] [[1,1],[x+y,1],[x-y,1]]
[85] afo
0
[86]