More consistent syntax

Perl uses "sigils" to indicate variable types:

$a     - scalar variable (integer, string, float, object)
@a     - array
%a     - hash

Perl 5: sigils could "change" based on the operation:

@a = ( 'alice', 'bob', 'carol' );
$first = $a[0];                      # note "$a" to access "@a"