5.4.6  Storing and recalling variables and their values: archive unarchive

The archive command stores the values of variables for later use in a file of your choosing.

• archive takes two arguments:
  • filename, a filename in which to store values.
  • vars, a variable or list of variables.
• archive("filename",vars) saves the values of vars (or the values of the variables in the list) in file filename.

For example, if the variable a has the value 2 and the variable bee has the value "letter" (a string), then entering

will create a file named “foo” which contains the values 2 and "letter" in a format meant to be efficiently read by Xcas.

The unarchive command will read the values from a file created with archive.

• unarchive takes one argument:
  filename, the filename.
• unarchive("filename") returns the value or list of values stored in filename.

Example.
With the file “foo” as above:
Input:

Output:

If you want to reassign these values to a and bee, you can enter