manual:chapter6:operators:cmd_ovr_xeq [newRPL User Manual]

Execute a program

Input Stack		Output Stack
O₁	→	see list under Description
Level 1	→	Level n	…	Level 1

Legend

Legend	Object type
O	Any object
I	Integer number
R	Real number
#	Binary number
Num	Scalar (Integer, Real or Binary number)
Z	Complex number
U	Unit
∡	Angle
A	Symbolic expression
C	Symbolic constant
V	Vector
M	Matrix
S	String
1/0	Any expression evaluating to True or False
G	Grob
F	Font
D	Binary data container
T	Tag object
L	List
cL	Case list
N	Variable name / Identifier
Dir	Directory
pDir	Packed Directory
P	Program
Lib	Library

The XEQ command executes the object on the top level of the stack.

The effect of the execution and the resulting output depends on the type of object being executed, as summarized by the following list.

Program: XEQ enters each object in the program:
1. an unquoted Name is EVALuated;
2. a Keyword is XEQted;
3. other objects are put on the stack.
Other objects: XEQ puts the object on the stack.

This command is new in newRPL and does not exist in userRPL.

The command

1:                    « '16' √ »
……………………………………………………………………………………
XEQ

will perform the following steps:

Resulting in

1:                         '√16'
……………………………………………………………………………………

Overloadable operators 26 3 NEW

Operator	Short Description
Evaluation operators:
EVAL1	Evaluate one level	NEW
EVAL	Evaluate full depth
XEQ	Execute	NEW
→NUM	Compute numeric result
Test operators:
==	Equality test
≠	Not equal test
<	Less than test
≤	Less than or equal test
>	Greater than test
≥	Greater than or equal test
CMP	Comparison test (<0 if A<B, 0 if A==B, >0 if A>B)	NEW
SAME	Comparison test, true if objects are the same
ISTRUE	True test	NEW
Logical operators:
AND	Logical AND
OR	Logical OR
XOR	Logical XOR
NOT	Logical NOT
Mathematic operators:
+	Addition
-	Subtraction
*	Multiplication
/	Division
^	Power
XROOT	Root
INV	Inverse
NEG	Negate/change sign
ABS	Magnitude or absolute value