public function dn( $domain, $singular, $plural, $number )
	{
		if( $this->_getPluralIndex( $number, $this->getLocale() ) > 0 ) {
			return (string) $plural;
		}

		return (string) $singular;
	}
public function dn( $domain, $singular, $plural, $number )
	{
		if( $this->_getPluralIndex( $number, $this->getLocale() ) > 0 ) {
			return (string) $plural;
		}

		return (string) $singular;
	}
public function dn ( $ domain , $ singular , $ plural , $ number ) { if ( $ this -> _getPluralIndex ( $ number , $ this -> getLocale ( ) ) > 0 ) { return ( string ) $ plural ; } return ( string ) $ singular ; }
Returns the plural string by given number.

@param string $domain Translation domain
@param string $singular String in singular form
@param string $plural String in plural form
@param integer $number Quantity to choose the correct plural form for languages with plural forms
@return string Returns the translated singular or plural form of the string depending on the given number
@throws MW_Translation_Exception If the initialization of the translation
Returns the plural string by given number .