https://github.com/jrincayc/ucblogo-code
Revision 68a93248641e91314d2700e8a3c6ba0c73ba5422 authored by Joshua J. Cogliati on 27 December 2021, 16:56:40 UTC, committed by Joshua J. Cogliati on 27 December 2021, 16:56:40 UTC
1 parent e3a5d7a
Tip revision: 68a93248641e91314d2700e8a3c6ba0c73ba5422 authored by Joshua J. Cogliati on 27 December 2021, 16:56:40 UTC
Updating version to 6.2.2pre1
Updating version to 6.2.2pre1
Tip revision: 68a9324
catch
CATCH tag instructionlist
command or operation. Runs its second input. Outputs if that
instructionlist outputs. If, while running the instructionlist,
a THROW instruction is executed with a tag equal to the first
input (case-insensitive comparison), then the running of the
instructionlist is terminated immediately. In this case the CATCH
outputs if a value input is given to THROW. The tag must be a word.
If the tag is the word ERROR, then any error condition that arises
during the running of the instructionlist has the effect of THROW
"ERROR instead of printing an error message and returning to
toplevel. The CATCH does not output if an error is caught. Also,
during the running of the instructionlist, the variable ERRACT is
temporarily unbound. (If there is an error while ERRACT has a
value, that value is taken as an instructionlist to be run after
printing the error message. Typically the value of ERRACT, if any,
is the list [PAUSE].)
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