How to downgrade or install a specific version of Composer?

php windows composer-php

PHP Snippet 1:

composer self-update 1.10.14

PHP Snippet 2:

sudo -H composer self-update 1.10.14

PHP Snippet 3:

curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer --1

PHP Snippet 4:

composer self-update 1.10.12
composer self-update 2.0.7

PHP Snippet 5:

composer self-update --1 or 2