Get file url in node for Drupal 8 twig template

node.twig.html

{# Get URL of single file field #}
{{ node.field_file.entity.uri.value }}

{# Get URL of multi file field #}
{{ node.field_file['#items'].entity.uri.value }}

{# Trun into link #}
{{ file_url(node.field_file.entity.uri.value) }}

{# Check if there is at least one value #}
{% if node.field_file[0] %}
  // Do something...
{% endif %}