$a = 'test';
print('$a\n');   # prints: $a\n
print("$a\n");   # prints: test and a newline
print("\$a\n");  # prints: $a and a newline

@a = qw( a b c );
print('@a\n');   # prints: @a\n
print("@a\n");   # prints: abc and a newline
print("\@a\n");  # prints: @a and a newline