Magento 2 Modes , Set Mode in Magento 2

Display the current mode in Magento 2 using CLI/Command Prompt

bin/magento deploy:mode:show

This will result in something like below

Current application mode: {mode}.

{mode} can be either default, developer, or production

bin/magento deploy:mode:set {mode}

{mode} can be either default, developer, or production. If changing to developer mode, out put will be like below