how to install composer in laravel project code example

Example 1: install laravel

composer create-project --prefer-dist laravel/laravel blog

Example 2: laravel install by composer

composer create-project --prefer-dist laravel/laravel blog 
cd example-app
php artisan serve

Example 3: installation laravel 7

composer create-project --prefer-dist laravel/laravel:^7.0 blog