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BEGIN and END Blocks in Perl
You may define any number of code blocks named BEGIN and END in Perl programs, which act as constructors and destructors respectively.
BEGIN { ... }
END { ... }
BEGIN { ... }
END { ... }- Every BEGIN block is executed after the perl script is loaded and compiled but before any other statement is executed.
- Every END block is executed just before the perl interpreter exits.
- The BEGIN and END blocks are particularly useful when creating Perl modules.
Following example shows its usage −
Example
#!/usr/bin/perl
package Foo;
print "Begin and Block Demo\n";
BEGIN {
print "This is BEGIN Block\n"
}
END {
print "This is END Block\n"
}
1;Output
When above code is executed, it produces the following result −
This is BEGIN Block Begin and Block Demo This is END Block
Updated on: 02-Dec-2019
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