The return value of an eval() is simply the value of the last expression evaluated in the eval, or undef if there is an error. Is there something you want to do with an eval that you might want to explain?

(update) Here's a simple example that should help you with the idea: perl -le "print eval(print 1+1)" produces: 

2      <-- printed within the eval()
1      <-- printed outside the eval()

[download]

(further update)When I have a question like this, I just try it: perl -le "$i=5;print $i,eval('$i++;print $i;');print $i" produces: 

6      <-- printed outside the eval(), but AFTER it has run so $i has 
+been incremented
61      <-- 6 printed within the eval(), 1 printed outside
6      <-- printed in the next statement outside the eval()

[download]

Conclusion: eval() operates within the context of the host program.

In reply to RE: eval output by Albannach
in thread eval output by thealienz1

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