# swift | The Swift Programming Language | Knowledge Base | Instagit

The Swift Programming Language

GitHub Stars: 69.7k

Repository: https://github.com/swiftlang/swift

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## Articles

### [Swift Switch Case Statement: Syntax, Patterns, and Compiler Internals](/swiftlang/swift/proper-syntax-usage-swift-switch-case)

Master Swift switch case statements with clear syntax patterns and compiler insights. Learn how to perform exhaustive pattern matching effectively and improve your Swift code today.

- Tags: internals
- Published: 2026-02-15

### [Swift Benefit of Using a Guard Statement: Early Exit Patterns for Safer Code](/swiftlang/swift/what-is-swift-guard-benefit)

Discover the swift benefit of guard statements for early exits. Reduce nested code and ensure safer optional unwrapping. Write cleaner Swift code today.

- Tags: tutorial
- Published: 2026-02-13

### [How to Write a For Loop in Swift 3 for an Array You Modify During Iteration](/swiftlang/swift/how-write-for-loop-in-swift-modify-array)

Learn how to write a for loop in Swift 3 that safely modifies an array during iteration. Discover methods like index-based while loops and enumerated() for in-place mutations.

- Tags: how-to-guide
- Published: 2026-02-12