How to get Currency Symbol in magento2

Below script will helpful to return the currency symbol in magento2. Here i add script into my model class.

class MyModel extends \Magento\Framework\Model\AbstractModel{
 protected $currencySymbol;
 public function __construct(\Magento\Framework\View\Element\Template\Context $context,\Magento\Directory\Model\Currency $currencySymbol,array $data = []) {
 parent::__construct($context, $data);
 $this->_currency = $currencySymbol;
 }
public function getCurrencySymbol() {
 return $this->_currency->getCurrencySymbol();
 }
}

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