What is the standard library?

The standard library contains the core functionality for Rust. It is split into four parts:

• The standard modules
• Primitive types
• Macros
• Prelude

The standard modules (overview)

The standard modules implement the likes of string handling, IO, network, and operating system calls. There are around 60 of these modules in total. Some are self-contained while others provide implementations for traits and structs.

The module names may give rise to some confusion as they share the same name with a primitive type (such as i32).

Primitive types (overview)

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