2nd/10_Wiki/Dev/Topic_CSharp/CSharp_Foreach_Loop.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-foreach-loop	C# Foreach Loop	Programming_Language	draft	conceptual		foreach in C# C# foreach 반복문		B	0.82	2026-07-04	2026-07-04			csharp programming-language w3schools loops foreach	https://www.w3schools.com/cs/cs_foreach_loop.php

CSharp Foreach Loop

🎯 한 줄 통찰 (One-line insight)

C# spells its range-based loop as the dedicated keyword foreach (type variableName in arrayName), whereas C++11's equivalent range-based for loop reuses the SAME for keyword with a colon (for (type var : container)) — same underlying concept (iterate every element without manual indexing) expressed through two genuinely different keywords, meaning "foreach" isn't just C++'s range-for renamed, it's C#'s own dedicated syntax that happens to solve the identical problem. [S1]

🧠 핵심 개념 (Core concepts)

• foreach (type variableName in arrayName) { ... } — a loop construct used EXCLUSIVELY for iterating over elements of an array (or other data sets); no index variable, no manual bounds. [S1]
• in keyword — connects the per-element variable to the collection being iterated, distinct from C++'s : colon syntax for the same relationship. [S1]
• No indexing needed — unlike a for loop over an array (arr[i]), foreach never exposes an index; you only get direct access to each element's value. [S1]
• Deferred prerequisite — the tutorial explicitly tells readers not to worry about the array syntax shown here, deferring full array coverage to the later Arrays chapter. [S1]

📖 세부 내용 (Details)

• Example: string[] cars = {"Volvo", "BMW", "Ford", "Mazda"}; foreach (string i in cars) { Console.WriteLine(i); } — prints all four car names, one per line. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

• for가 아니라 별도 키워드 foreach를 사용함: C++11의 범위 기반 for 루프(for (string car : cars))는 기존 for 키워드를 콜론(:)과 함께 재사용했지만, C#은 foreach라는 완전히 별도의 전용 키워드와 in을 사용한다는 점이 확인됨 — 개념은 동일(인덱스 없이 각 원소 순회)하지만 문법 표현이 실제로 다름. [S1]

🛠️ 적용 사례 (Applied in summary)

자동차 이름이 담긴 문자열 배열을 foreach로 순회해 각 원소를 출력하는 예제가 원문에서 직접 실전 활용 사례로 제시됨. [S1]

💻 코드 패턴 (Code patterns)

foreach — dedicated keyword + in, unlike C++'s for ... : syntax (C#):

string[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
foreach (string i in cars)
{
    Console.WriteLine(i);
}

✅ 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 For Loop, CSharp Break, CSharp Arrays, CPP For Loop Foreach
• 참조 맥락: Loops 섹션 — Break and Continue 챕터로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — C# Foreach Loop — https://www.w3schools.com/cs/cs_foreach_loop.php

📝 변경 이력 (Change history)

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