Try
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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
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