Hi Monks,

Greetings.!!!!

I have a small doubt in variable substituation in eval function. Please see the below code and output.

===============

$aa = 4; $bb = 0; eval { $cc = $aa/$bb; }; if ( $@ ) { print "Wrong = Divide by Zero\n"; } else { print "No Exception = Continue your code here\n"; }

OUTPUT:

Wrong = Divide by Zero

===============

But if I use the constant instead of variable, the exception catch is not happening. I am getting the actual run time error.

===============

eval { $cc = 4/0; }; if ( $@ ) { print "Wrong = Divide by Zero\n"; } else { print "No Exception = Continue your code here\n"; }

OUTPUT:

Illegal division by zero at test.pl line 2.

===============

Could anyone let me know the reason for the different output for the same code.

Edited by planetscape - added code tags and rudimentary formatting

( keep:2 edit:28 reap:0 )


In reply to Variables in eval funcation by santhanamv

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.