do i need to install symfony code example

Example 1: create symfony project

/usr/bin/composer create-project symfony/skeleton /home/handwork/symfony
#create symfony projet de base
# un dossier cacher du meme nom du projet serai creer

Example 2: symfony new project

# use the most recent LTS version
$ symfony new my_project_name --version=lts

# use the 'next' Symfony version to be released (still in development)
$ symfony new my_project_name --version=next

# you can also select an exact specific Symfony version
$ symfony new my_project_name --version=4.4

# The --full option installs all the packages that you usually need to build web applications.