A package manager extends Julia beyond its rich standard library by making third-party libraries easy to add when built-in capabilities are not enough. section 1.2
Julia encourages a package-first workflow: build reusable packages before turning them into applications. The package manager operates inside the Julia interactive environment, alongside other tools such as the debugger. section 1.8
From built-in tools to extensions
Linear algebra, statistics, HTTP, string manipulation, and date formats are available through Julia’s standard library. When a needed capability is absent, the package manager provides the route to add a third-party library without searching manually across the web. section 1.2
