2nd/10_Wiki/Topics/Domain_Programming/Topic_CSharp/CSharp_Switch.md

id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit

id	title	category	status	verification_status	canonical_id	aliases	duplicate_of	source_trust_level	confidence_score	created_at	updated_at	review_reason	merge_history	tags	raw_sources	applied_in	github_commit
csharp-switch	C# Switch	Programming_Language	draft	conceptual		switch case break default C# C# 스위치문		B	0.82	2026-07-04	2026-07-04			csharp programming-language w3schools switch	https://www.w3schools.com/cs/cs_switch.php

CSharp Switch

🎯 한 줄 통찰 (One-line insight)

The switch(expression) { case x: ... break; default: ... break; } skeleton is structurally identical to C/C++'s switch statement — same case/break/default keywords, same "evaluate once, compare against each case" model — making Switch the fourth chapter in the C# series (after Comments, Operators, Special Characters) where the answer to "what's different from C++" is essentially nothing at the syntax level shown here. [S1]

🧠 핵심 개념 (Core concepts)

• switch(expression) — evaluated exactly ONCE, then compared against each case value in order. [S1]
• case x: — if the switch expression matches x, that block's code runs. [S1]
• break — exits the switch block immediately once a match's code has run, preventing execution from continuing into subsequent cases; described as saving execution time by skipping the rest of the block. [S1]
• default: — optional; runs when NO case matches the expression. [S1]

📖 세부 내용 (Details)

• Weekday-name example: switch (day) { case 1: Console.WriteLine("Monday"); break; ... case 7: Console.WriteLine("Sunday"); break; } with day = 4 → outputs "Thursday". [S1]
• Default fallback example: switch (day) { case 6: ...Saturday...; break; case 7: ...Sunday...; break; default: Console.WriteLine("Looking forward to the Weekend."); break; } with day = 4 (no matching case) → outputs "Looking forward to the Weekend." via default. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

• switch 구조가 C/C++와 동일: switch/case/break/default 키워드와 전체 구조가 C/C++의 switch문과 차이가 없다는 점이 확인됨 — Comments, Operators, Special Characters에 이은 네 번째 "구조 동일" 챕터. [S1]

🛠️ 적용 사례 (Applied in summary)

요일 번호(day)를 받아 요일 이름을 출력하는 switch문과, 매치되는 case가 없을 때 default로 넘어가는 예제가 원문에서 직접 실전 활용 사례로 제시됨. [S1]

💻 코드 패턴 (Code patterns)

Switch with break and default (C#):

int day = 4;
switch (day)
{
    case 1:
        Console.WriteLine("Monday");
        break;
    case 4:
        Console.WriteLine("Thursday");
        break;
    default:
        Console.WriteLine("Looking forward to the Weekend.");
        break;
}
// Outputs "Thursday"

✅ 검증 상태 및 신뢰도

• 상태: draft
• 검증 단계: conceptual
• 출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
• 신뢰 점수: 0.82
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: C# Tutorial
• 관련 개념: CSharp Conditions Shorthand, CSharp While Loop, CPP Switch
• 참조 맥락: Switch 섹션의 유일 챕터 — Loops 섹션으로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — C# Switch — https://www.w3schools.com/cs/cs_switch.php

📝 변경 이력 (Change history)

• 2026-07-04: Initial draft synthesized from the W3Schools "C# Switch" page (Astra wiki-curation, P-Reinforce v3.1 format).