How to get Currency data: Code, Rate, Symbol in Magento 2

<?php
namespace Chapagain\HelloWorld\Block;
class HelloWorld extends \Magento\Framework\View\Element\Template
{
    protected $_storeManager;
    protected $_currency;
    
    public function __construct(
        \Magento\Backend\Block\Template\Context $context,        
        \Magento\Store\Model\StoreManagerInterface $storeManager,
        \Magento\Directory\Model\Currency $currency,        
        array $data = []
    )
    {        
        $this->_storeManager = $storeManager;
        $this->_currency = $currency;        
        parent::__construct($context, $data);
    }
    
        
    /**
     * Get store base currency code
     *
     * @return string
     */
    public function getBaseCurrencyCode()
    {
        return $this->_storeManager->getStore()->getBaseCurrencyCode();
    }
    
     /**
     * Get current store currency code
     *
     * @return string
     */
    public function getCurrentCurrencyCode()
    {
        return $this->_storeManager->getStore()->getCurrentCurrencyCode();
    }    
    
    /**
     * Get default store currency code
     *
     * @return string
     */
    public function getDefaultCurrencyCode()
    {
        return $this->_storeManager->getStore()->getDefaultCurrencyCode();
    }
    
    /**
     * Get allowed store currency codes
     *
     * If base currency is not allowed in current website config scope,
     * then it can be disabled with $skipBaseNotAllowed
     *
     * @param bool $skipBaseNotAllowed
     * @return array
     */
    public function getAvailableCurrencyCodes($skipBaseNotAllowed = false)
    {
        return $this->_storeManager->getStore()->getAvailableCurrencyCodes($skipBaseNotAllowed);
    }
    
    /**
     * Get array of installed currencies for the scope
     *
     * @return array
     */
    public function getAllowedCurrencies()
    {
        return $this->_storeManager->getStore()->getAllowedCurrencies();
    }
    
    /**
     * Get current currency rate
     *
     * @return float
     */
    public function getCurrentCurrencyRate()
    {
        return $this->_storeManager->getStore()->getCurrentCurrencyRate();
    }
    
    /**
     * Get currency symbol for current locale and currency code
     *
     * @return string
     */    
    public function getCurrentCurrencySymbol()
    {
        return $this->_currency->getCurrencySymbol();
    }    
}
?>

echo $block->getCurrentCurrencySymbol() . '<br />';
echo $block->getCurrentCurrencyCode() . '<br />';
echo $block->getBaseCurrencyCode() . '<br />';
echo $block->getDefaultCurrencyCode() . '<br />';
echo $block->getCurrentCurrencyRate() . '<br />';
 
print_r($block->getAvailableCurrencyCodes()) . '<br />';
print_r($block->getAllowedCurrencies()) . '<br />';