Swift switch Statement
🔁 Swift switch Statement – Complete Beginner to Interview Guide
In Swift switch Statement lets you run different blocks of code based on the value of a variable or expression.
Swift’s switch statement is more robust and secure than those found in many other programming languages.
1️⃣ What is switch in Swift? ⭐
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Checks a value against multiple cases
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Executes the matching case
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Must be exhaustive (cover all possibilities)
Basic Syntax
2️⃣ Simple switch Example ⭐
Output
3️⃣ switch with Characters ⭐
Output
4️⃣ switch with Ranges ⭐⭐ (Very Important)
Output
📌 ... → closed range
📌 ..< → half-open range
5️⃣ Multiple Values in One Case ⭐⭐
Output
6️⃣ switch Without break ⭐⭐⭐
👉 Swift does NOT need break
Each case automatically stops after execution.
Output
7️⃣ Using fallthrough ⭐⭐
If you want to continue to the next case:
Output
8️⃣ switch with where Clause ⭐⭐⭐
Output
9️⃣ switch with Tuples ⭐⭐⭐
Output
🔟 Common Mistakes ❌
❌ Forgetting default (when needed)
❌ Using overlapping ranges
❌ Expecting automatic fallthrough
❌ Using break unnecessarily
📌 Interview Questions (Swift switch)
Q1. Is break required in Swift switch?
👉 No
Q2. What is fallthrough?
👉 Forces execution of next case
Q3. Can switch work with ranges?
👉 Yes
Q4. Is switch exhaustive in Swift?
👉 Yes (must cover all cases)
✅ Summary
✔ switch is safer than if–else
✔ No break needed
✔ Supports ranges, tuples, where
✔ fallthrough is optional
✔ Very important for Swift interviews
