Get Started with the Developer Console | Salesforce Trailhead
https://trailhead.salesforce.com/content/learn/modules/developer_console/developer_console_intro
WEBThe Developer Console is an integrated development environment (more typically called an IDE) where you can create, debug, and test apps in your org. It’s your one-stop solution for a variety of development tasks. Navigate, open, create, and edit Apex classes and triggers, Aura components, and Visualforce pages and components.
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