Plural rules

If activeLanguage = 'en', then these translation texts:

// l10n.en.json
{
  "updated": "This page has been updated " +
     "{{ 0 | plural : 0=just now; 1=one minute ago; 2~10=# minutes ago; other=formerly }}."
}

And this employ will produce the indicated output:

<ng-container *translate="let t; node: 'l10n'">
  <div>{{ t('updated', 0) }}</div>
  <div>{{ t('updated', 1) }}</div>
  <div>{{ t('updated', 5) }}</div>
  <div>{{ t('updated', 20) }}</div>
</ng-container>

// HTML output
It has been updated just now.
It has been updated one minute ago.
It has been updated 5 minutes ago.
It has been updated formerly.
 

Each option determines a text to be displayed depending on the value passed.

option key

number

The option value is displayed if the key matches the value passed.

number~number

If the option key defines a range, the option value is displayed when the value passed is in the range. The boundaries of the range are separated by a tilde (~),

"other"

The option value is displayed when none of the option keys matches the value passed.

option value

Represents a text to be displayed when the option key matches the value passed. If the text contains a hashmark (#), it is replaced by the value passed.