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The PUSH and POP commands
Occasionally it is desirable to transfer results from the normal HOME view to
the CAS screen or vice versa. This is done using the PUSH and POP
commands.
Suppose we have just expanded (2x+3)
4
in the CAS, as shown right. If we press ON
to exit the CAS and then type POP in the
HOME view then the result will be retrieved
to the HOME screen as shown.
In this case we might wish to also paste the
result into the Function aplet. This can be done by
using to retrieve the expression, enclosing it
in single quotes from the CHARS view and then
storing it ( ) into F1(X) or whichever is desired.
The reverse process is also possible
using PUSH but it is more limited in that
you must use the symbolic variable S1.
When you then press you will
find that seemingly there has been no
result. However, pressing HOME you
will find that the expression has been added to
the tail of the CAS History and can now be
’d to the editing screen for use.
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