How to know which version of Symfony I have?

Question

I know that I have downloaded a Symfony2 project and started with but I have updated my vendor several times and I want to know which version of symfony I have

Answer 1

For Symfony 3.4

Check the constant in this file vendor/symfony/http-kernel/Kernel.php

const VERSION = '3.4.3';

OR

composer show | grep symfony/http-kernel