2nd/10_Wiki/Topic_Programming/Topic_CSharp/CSharp_Conditions_ElseIf.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-conditions-elseif	C# The else if Statement	Programming_Language	draft	conceptual		else if statement C# C# else if 문		B	0.82	2026-07-04	2026-07-04			csharp programming-language w3schools conditions elseif	https://www.w3schools.com/cs/cs_conditions_elseif.php

CSharp Conditions ElseIf

🎯 한 줄 통찰 (One-line insight)

else if is not a distinct keyword in C# any more than in C/C++/Java — it's just an else block whose body happens to be another if statement, which the three-way morning/day/evening example makes visible: each additional else if is really nested inside the previous else, and the chain only terminates in a plain else when every prior condition has failed, evaluated strictly top-to-bottom with short-circuit stopping at the first true condition. [S1]

🧠 핵심 개념 (Core concepts)

• else if — tests a NEW condition only when all prior conditions in the chain were false. [S1]
• Syntax: if (condition1) {...} else if (condition2) {...} else {...} — any number of else if blocks can be chained between the initial if and the final else. [S1]
• Top-to-bottom, first-match evaluation — conditions are checked in order; the first one that's true runs its block and the rest of the chain is skipped entirely. [S1]

📖 세부 내용 (Details)

• Three-branch time-of-day example: int time = 22; if (time < 10) { Console.WriteLine("Good morning."); } else if (time < 20) { Console.WriteLine("Good day."); } else { Console.WriteLine("Good evening."); } — since 22 is not < 10 (condition1 false) and not < 20 (condition2 also false), execution falls through to the final else, printing "Good evening.". [S1]
• The tutorial notes that if time were 14 instead, the program would print "Good day." (condition2 would be true). [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

• else if는 별도 키워드가 아니라 else의 본문이 if인 구조: C/C++/Java와 마찬가지로 C#의 else if 체인도 실제로는 else 블록 안에 또 다른 if가 중첩된 구조라는 점이 삼단계 시간대 예제(morning/day/evening)로 다시 확인됨 — 문법적 특수 케이스가 아니라 else+if의 자연스러운 조합. [S1]

🛠️ 적용 사례 (Applied in summary)

아침/낮/저녁 인사말을 시간(time) 값에 따라 세 가지로 분기하는 예제가 원문에서 직접 실전 활용 사례로 제시됨. [S1]

💻 코드 패턴 (Code patterns)

Chained else-if — first true condition wins, rest skipped (C#):

int time = 22;
if (time < 10)
{
    Console.WriteLine("Good morning.");
}
else if (time < 20)
{
    Console.WriteLine("Good day.");
}
else
{
    Console.WriteLine("Good evening.");
}
// Outputs "Good evening."

✅ 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 Else, CSharp Conditions Shorthand, CSharp Switch
• 참조 맥락: Conditions 섹션 — Short Hand If...Else 챕터로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — C# The else if Statement — https://www.w3schools.com/cs/cs_conditions_elseif.php

📝 변경 이력 (Change history)

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