perl function goto

The goto statement is a control structure in Perl that allows you to jump to another part of your program, usually a label or a line number. It can be used to implement loops, conditionals, and subroutines, although its use is generally discouraged as it can make code hard to read and maintain.

Here's an example that demonstrates how to use goto:

#!/usr/bin/perl

use strict;
use warnings;

# Loop from 1 to 10 using a goto statement
my $i = 1;
START:
print "$i\n";
$i++;
if ($i <= 10) {
    goto START;
}

In this example, we use a goto statement to implement a loop that counts from 1 to 10. We first initialize the variable $i to 1. We then define a label called START using a colon (:) after the label name. We print the value of $i, increment it by 1, and then check if it is less than or equal to 10. If it is, we use the goto statement to jump to the START label, which starts the loop again.

Note that the use of goto can make code difficult to understand and maintain, and should be avoided whenever possible. In general, it is better to use structured control flow statements like while, for, if, and sub to implement loops, conditionals, and subroutines, as they are easier to read and understand.