Flow control

http://perldoc.perl.org/perlsyn.html#Compound-Statements

http://perldoc.perl.org/perlintro.html#Conditional-and-looping-constructs

Conditionals

my $false_1 = 0;
my $false_2 = '0';
my $false_3 = '';
my $false_4 = ();
my $false_5 = undef;

my $true = 'rest';

if ($false_1) {
    say 'if block executed';
} elsif ($true) {
    say 'elsif block executed';
} else {
    say 'else block executed';
}

Loops

for / foreach : http://perldoc.perl.org/perlsyn.html#Foreach-Loops
next, do, last, continue : http://perldoc.perl.org/perlsyn.html#Loop-Control
next: go the next loop iteration
last: exit the loop
redo: restart the loop

while

my @list = ('one', 'two', 'three');

while (@list) {
    say shift @list;
}

until

for

This is the Perl way for for-loops:

for (1..10) {
    say 'Counter: ' . $_;
}

However, C-style loops could be used as well:

for (my $i = 0; $i < 10; $i++) {
    say 'Counter: ' . ($i + 1);
}

foreach

For and foreach can be used as synonyms.

Labels and continue

while, until and for loops support labels in order to