How would you trap error occurred in the perl program/file?
Answers were Sorted based on User's Feedback
Answer / prabhath kota
You can catch the errros by using eval function.
Keep your code in eval block some thing like shown below.
Eg.,
#################################
eval {
my $a = 0;
my $b = $a/0; #Dividing 0 with 0 is definitely an error
};
if ($@) {
print "\n Error in your code";
}
############################
-> Eval block always ends with a semi-colon. $@ will catch
the errors persent.
-> If any errors are present $@ will be set otherwise $@
will not be set
-> Unfortunately in Perl we don't have Explicit Error
handling techniques like some other languages like java etc
I mean like IOException etc.,
Is This Answer Correct ? | 5 Yes | 3 No |
Answer / shah faisal
#Ist trapping the error in a block
eval {
# perl code goes here
};
if ($@) { # $@ is a special variable containing the error
if any else blank
print "Print your own error If u want";
}
# 2nd
# use if or unless for a loop ;ike below
if(chk some condition)
{
die"$!\n"; # if the condition success
}
system generated error is printed and the scirpt is exited
}
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / perly_whirly
Put your code inside of an eval. If an error occurs, the $@ variable will contain
the error. You can also raise an error by using die inside of an eval.
Is This Answer Correct ? | 1 Yes | 3 No |
What are perl strings?
Explain split function in perl?
What does this symbol mean '->'?
write a Perl script to find a particular word in a paragraph???
what are prefix dereferencer and list them out?
How to print escaping characters inside a string in perl?
What value is returned by a lone `return;’ statement?
what is the function that is used to identify how many characters are there in a string?
What is the use of command “use strict”?
There are two types of eval statements i.e. Eval expr and eval block. Explain them.
How can memory be managed in Perl?
Comment on the scope of variables in perl.