title: What is the meaning of `$array[x, y]` in Perl?
body: <p>I know <code>@array[0,2,6]</code> is an array with multiple values.</p>
  
  <p>And I was under the belief that <code>$scalar=3</code> is a single variable with a single scalar value.</p>
  
  <p>However, what is <code>$array[3, 4]</code>? Is it a scalar variable with two values?</p>