The use of an annotative &#x27;#e&#x27; to get an exact number contrasts with Perl 6&#x27;s choices for the default interpretation of number literals. The Perl 6 choice adopts scientific notation to correspond to floats:<p><pre><code>    200000000000000000000  # exact (integer)  2 * 10 ** 20 
    0.00000000000000000002 # exact (rational) 2 * 10 ** -20
    0.2e-19                # inexact (float)  2 * 10 ** -20
    2e20                   # inexact (float)  2 * 10 ** 20</code></pre>