If you want to create customer using programming in Magento 2, then use the following code.

1. Create savecustomer.php file at magento 2 root folder

2. Put below code in the savecustomer.php file

<?php
use MagentoFrameworkAppBootstrap;

require __DIR__ . '/app/bootstrap.php';

$bootstraps = Bootstrap::create(BP, $_SERVER);

$objectManager = $bootstraps->getObjectManager();

$appState = $objectManager->get('MagentoFrameworkAppState');

$appState->setAreaCode('frontend');

$storeManager = $objectManager->get('MagentoStoreModelStoreManagerInterface');

$websiteId = $storeManager->getStore()->getWebsiteId();

$resource = $objectManager->get('MagentoFrameworkAppResourceConnection');

$connection = $resource->getConnection();

use MagentoCustomerApiAccountManagementInterface;

use MagentoCustomerModelAccountManagement;

$customer = $objectManager->get('MagentoCustomerModelCustomerFactory')->create();

$customer->setWebsiteId($websiteId);

if ($customer->loadByEmail('stevealbini820@gmail.com')->getId()) {
	echo '<br>';
	echo 'Customer with email '.$email.' is already registered.';  
} else {
	try {
		// prepare customer data
		$customer->setEmail('stevealbini820@gmail.com'); 
		$customer->setFirstname('firstName');
		$customer->setLastname('lastName');

		// set null to auto-generate password
		$customer->setPassword('password');

		
		$customer->setForceConfirmed(true);

		// save data
		$customer->save();

		// save customer address
		// this is optional
		// you can skip saving customer address while creating the customer
		$customerAddress = $objectManager->get('MagentoCustomerModelAddressFactory')->create();
		$customerAddress->setCustomerId($customer->getId())
			->setFirstname('steve')
			->setLastname('albini')
			->setCountryId('US')
			->setRegionId('12')
			->setRegion('Florida')
			->setPostcode('11003')
			->setCity('Miami')
			->setTelephone('111-222-4444')
			->setFax('111-222-4444')
			->setCompany('MageMonkeys')
			->setStreet(array(
				'0' => 'Your Customer Address 1', // compulsory
				'1' => 'Your Customer Address 2' // optional
			)) 
			->setIsDefaultBilling('1')
			->setIsDefaultShipping('1')
			->setSaveInAddressBook('1');


		try {
			// save customer address
			$customerAddress->save();
		} catch (Exception $e) {
			echo '<br>Cannot save customer address.';
		}                
		
		// send welcome email to the customer
		$customer->sendNewAccountEmail();

		try {
        	$accountManagementInterface = $objectManager->get('MagentoCustomerApiAccountManagementInterface')->create();
            $accountManagementInterface->initiatePasswordReset($email,AccountManagement::EMAIL_RESET,$customer->getWebsiteId());
    	} 
        catch (NoSuchEntityException $e) {
			// Do nothing, we don't want anyone to use this action to determine which email accounts are registered.
		} catch (Exception $exception) {
			echo '<br>Cannot send reset link email.';            
		}

	} catch (Exception $e) {
    	echo '<br>';
        echo $e->getMessage();        
    }
}

?>

Run this file on browser to create customer. Hope this article is useful.