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 is perl unshift array function?
What are the advantages and disadvantages of perl language?
What is the difference between single (') and double (") quote in a string in perl?
What are the functions that can be performed using cgi program?
What?s your favorite module and why?
How many ways can we express string in Perl?
Explain about the applications of perl?
How to copy a file in perl?
How can you replace the characters from a string and save the number of replacements?
What is cpan ? What are the modules coming under this?
What is eval function in perl?
How do you set environment variables in perl?