• String operations. PAD demonstrates how to convert an object to
string form, count the number of characters, and concatenate two
Begin the program.
Make sure the object is in string
form. (Strings are unaffected by
Begin WHILE clause.
Does the string contain fewer
than 23 characters?
Begin REPEAT clause.
Add a leading space.
End REPEAT clause.
End the program.
Put the program on the stack.
Store the program as PAD.
Example. PAD is demonstrated in the program BDISP.
PRESERVE (Save and Restore Previous Status)
Given a program on the stack, store the current status, execute the
program, and then restore the previous status.
1 : «
(result of program)
• RCLF and STOF. PRESERVE uses RCLF
to record the
current status of the calculator in a binary integer and STOF
to restore the status from that binary integer.
28: Programming Examples