Exclude Current Entry

Question

How can I exclude the current entry when I've structured my syntax like this?

{% set entries = craft.entries({
  section:        'blog',
  order:          'postDate',
  limit:          5,
}) %}

Answer 1

{% set entries = craft.entries({
  section:        'blog',
  order:          'postDate',
  limit:          5,
  id:             'not ' ~ entry.id
}) %}

or

{% set entries = craft.entries({
  section:        'blog',
  order:          'postDate',
  limit:          5,
}).id('not ' ~ entry.id) %}