Texas Instruments TI-Nspire CAS User Manual

Try
Catalog >
Try
block1
Else
block2
EndTry
Executes block1 unless an error occurs.
Program execution transfers to block2 if an
error occurs in block1. System variable
errCode contains the error code to allow
the program to perform error recovery. For
a list of error codes, see “Error codes and
messages,” page 246.
block1 and block2 can be either a single
statement or a series of statements
separated with the “:” character.
Note for entering the example: For
instructions on entering multi-line program
and function definitions, refer to the
Calculator section of your product
guidebook.
To see the commands Try, ClrErr, and
PassErr in operation, enter the eigenvals()
program shown at the right. Run the
program by executing each of the following
expressions.
Note: See also ClrErr, page 29, and PassErr,
page 129.
Define eigenvals(a,b)=Prgm
© Program eigenvals(A,B) displays
eigenvalues of A•B
Try
Disp "A= ",a
Disp "B= ",b
Disp " "
Disp "Eigenvalues of A•B are:",eigVl(a*b)
Else
If errCode=230 Then
Disp "Error: Product of A•B must be a
square matrix"
ClrErr
Else
PassErr
EndIf
EndTry
EndPrgm
Alphabetical Listing 187

Texas Instruments TI-Nspire CAS Specifications

General

Type	Graphing
Cover	-
Form factor	Pocket
Control type	Buttons, Touch
Product color	Grey, Silver
Digits	- digits
Display tilting	No
Display resolution	320 x 240 pixels
Display number of lines	- lines
Compatible operating systems	Windows XP/2000\\r Mac OS X 10.4/10.5
Battery type	AAA
Power source	Battery
Number of batteries supported	4
USB port	Yes
USB 2.0 ports quantity	1
RAM capacity	16 MB
ROM capacity	20 MB

Weight and Dimensions

Depth	198.3 mm
Width	100 mm
Height	28.7 mm

Summary

Important Information

License

Discusses software license terms and conditions.

Expression Templates

Fraction template

Template for entering fractions.

Exponent template

Template for entering exponents.

Matrix template (m x n)

Template for creating mxn matrices.

First derivative template

Template for calculating first derivatives.

Alphabetical Listing

abs()

Returns the absolute value of the argument.

angle()

Returns the angle of an argument as a complex number.

ANOVA

Performs one-way analysis of variance.

approx()

Evaluates arguments to decimal values.

Symbols

+ (add)

Returns the sum of two arguments.

- (subtract)

Returns the difference between two arguments.

* (multiply)

Returns the product of two arguments.

/ (divide)

Returns the quotient of two arguments.

EOS™ (Equation Operating System) Hierarchy

Order of Evaluation

Details the priority levels for operators and functions.

Parentheses, Brackets, and Braces

Explains how grouped expressions are evaluated first.

Error Codes and Messages

Error code

Lists numeric error codes and their descriptions.

Warning Codes and Messages

Lists numeric warning codes and their associated messages.

Shortcuts for Entering Math Expressions

From the Handheld or Computer Keyboard

Lists shortcuts for handheld and computer input.

From the Computer Keyboard

Lists shortcuts specific to computer keyboard input.