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Circular References in Perl
A circular reference in Perl occurs when two references contain a reference to each other. You have to be careful while creating references otherwise a circular reference can lead to memory leaks. Following is an example −
Example
#!/usr/bin/perl my $foo = 100; $foo = \$foo; print "Value of foo is : ", $$foo, "\n";
Output
When the above program is executed, it produces the following result −
Value of foo is : REF(0x9aae38)
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