I'm assuming your writing the code in Java, so you can use the below code to find the element and then click on it:
driver.findElement(By.id("Value")).sendKeys(Keys.ENTER);
or
driver.findElement(By.id("Value")).sendKeys(Keys.RETURN);
For this to work, you should also import the "org.openqa.selenium.Keys" package.
For details, You can even check out Selenium concepts with the Selenium online course.