chromedriver for chrome code example

Example 1: chromedriver = webdriver.Chrome(“D:\driver\chromedriver.exe”)

driver = webdriver.Chrome(executable_path=r'DRIVER_PATH')

Example 2: chromedriver = webdriver.Chrome(“D:\driver\chromedriver.exe”)

"chromedriver = webdriver.Chrome(“D:\driver\chromedriver.exe”)" doesnt work for me 
so i found out if i use "driver = webdriver.Chrome(executable_path=r'DRIVER_PATH')"
 it works