Optionals in Swift Explained: if let, nil-coalescing (??) & Safe Unwrapping |
Автор: RaiTech Labs
Загружено: 2025-12-20
Просмотров: 24
🎉 Welcome to Day 11 of #100DaysOfiOS!
In this lesson, we break down one of the most important (and often confusing) Swift concepts — Optionals.
Optionals exist to safely handle values that may be missing (nil). Understanding them properly helps you avoid crashes and write more reliable iOS apps.
📘 What you’ll learn in this video:
What optionals are and why Swift uses them
What nil means in Swift
Force unwrapping (!) — when and why to avoid it
Safe unwrapping using optional binding (if let)
Using the nil-coalescing operator (??)
Real-world examples with dictionaries
Common beginner mistakes to avoid
🧠 Why this matters
Optionals are at the core of Swift’s safety model. Once you understand optionals, concepts like APIs, models, and SwiftUI state become much easier to work with.
🚀 Next Lesson:
Functions in Swift — writing reusable and clean code
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