Program:

Comments:

 

 

 

 

 

 

argm TYPE 6. SAME NOT

Tests if the argument is not a name. If so,

 

 

THEN

displays an error message and aborts

 

 

"Not name or list"

execution.

 

 

DOERR

 

 

 

END

 

 

 

END

Ends the CASE structure.

 

 

»

Ends the defining procedure.

 

 

»

 

 

 

 

 

 

 

`OVFYK

Enters the program, then stores it in VFY.

 

 

 

 

 

 

Checksum: # 31403d

 

Bytes:

139.5

 

Example: Execute VFY to test the validity of the name argument BEN. (The argument is valid and is simply returned to the stack.)

OBEN `

J%VFY%

Example: Execute VFY to test the validity of the list argument {BEN JEFF SARAH }. Use the name from the previous example, then enter the names JEFF and SARAH and convert the three names to a list.

OJEFF ` OSARAH `

3!°%LIST%%²LIST%

Execute VFY. Since the list contains too many names, the error message is displayed and execution is aborted.

J%VFY%

Converting Procedures from Algebraic to RPN

This section contains a program, →RPN, that converts an algebraic expression into a series (list) of objects in equivalent RPN order.

Level 1

→

Level 1

 

 

 

‘symb’

→

{ objects }

 

 

 

RPL Programming Examples 2-27