Perl/Basics/Boolean Logic/Statements/If

An if statement may have 3 types of clauses: if,elsif, and else. For the below example, assume that the $age scalar is passed as a command line argument:

if (int($age) == $age) { #Making sure it's an integer. if ($age < 18) { #If the age is less than 18: print "You must be at least 18 to view this.\n"; } elsif ($age < 21) { # If the age is more than 18, but less than 21: print "Because you are under 21, some features may be restricted.\n"; } else { # If none of the conditions have been met: display_content(); } }