Full Command and Function Reference 3-59
Object Type Effect of Evaluation
Tagged If the tag specifies a port, recalls and evaluates the
specified object. Otherwise, puts the untagged object
on the stack.
Algebraic Enters each object in the algebraic expression:
• Names are evaluated.
• Commands are evaluated.
• Other objects are put on the stack.
Command, Function, XLIB Name Evaluates the specified object.
Other Objects Puts the object on the stack.
To evaluate a symbolic argument to a numerical result, evaluate the argument in Numerical
Results mode (flag –3 set) or execute
→NUM on that argument.
Access: N
Flags: Numerical Results (–3)
Input/Output:
Level 1/Argument 1 Level 1/Item 1
obj
→
(see above)
See also: →NUM, SYSEVAL
EXLR
CAS: Return the left- and right-hand sides of an equation as separate expressions.
EX&LN
CAS: Display a menu or list of CAS exponential and logarithmic operations.
EXP
Type: Analytic Function
Description: Exponential Analytic Function: Returns the exponential, or natural antilogarithm, of the
argument; that is, e raised to the given power.
EXP uses extended precision constants and a special algorithm to compute its result to full 12-
digit precision for all arguments that do not trigger an underflow or overflow error.
EXP provides a more accurate result for the exponential than can be obtained by using e
Q.
The difference in accuracy increases as z increases. For example:
z
EXP(z) e
z
3 20.0855369232 20.0855369232
10 22026.4657948 22026.4657949
100 2.68811714182E43 2.68811714191E43
500 1.40359221785E217 1.40359221809E217
1000 1.9707111402E434 1.9707111469E434
For complex arguments: e
(x,y)
= e
x
cosy + ie
x
siny
Access: !¸ ( ¸is the left-shift of the Qkey).
Flags: Numerical Results (–3)
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