2nd/10_Wiki/Dev/Topic_CPP/CPP_For_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
cpp-for-loop	C++ For Loop	Programming_Language	draft	conceptual		for statement three-statement loop C++ for 반복문		B	0.84	2026-07-04	2026-07-04			cpp programming-language w3schools loops for-loop	https://www.w3schools.com/cpp/cpp_for_loop.asp

CPP For Loop

🎯 한 줄 통찰 (One-line insight)

C++'s for loop declares its counter INLINE inside the loop header (for (int i = 0; i < 5; i++)) rather than declaring int i; separately beforehand — a syntax choice the source demonstrates consistently across every example, meaning i's SCOPE is confined to the loop itself in idiomatic C++ usage, unlike C's tutorial style which more often declared the counter as a separate statement before the loop. [S1]

🧠 핵심 개념 (Core concepts)

• for (statement1; statement2; statement3) { ... } — statement1 runs once before the loop; statement2 is the continuation condition; statement3 runs after each iteration. [S1]
• Inline counter declaration — for (int i = 0; ...) scopes i to the loop itself, the idiomatic C++ style shown throughout. [S1]
• Fixed-count use case — the recommended tool when the number of iterations is known ahead of time. [S1]

📖 세부 내용 (Details)

• Basic counting with an inline-declared counter: for (int i = 0; i < 5; i++) { cout << i << "\n"; }. [S1]
• Accumulating a sum: int sum = 0; for (int i = 1; i <= 5; i++) { sum = sum + i; } cout << "Sum is " << sum;. [S1]
• Countdown via decrement: for (int i = 5; i > 0; i--) { cout << i << "\n"; }. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

• 루프 카운터를 for 헤더 안에서 바로 선언: C 챕터의 예제들은 int i;를 루프 밖에서 별도로 선언하는 경우가 있었지만, C++ 예제는 일관되게 for (int i = 0; ...) 형태로 헤더 안에서 바로 선언해 i의 스코프를 루프에 국한시킨다는 점이 확인됨. [S1]

🛠️ 적용 사례 (Applied in summary)

1부터 5까지의 합을 for 루프로 누적 계산하는 예제(sum = sum + i)가 원문에서 직접 실전 활용 사례로 제시됨. [S1]

💻 코드 패턴 (Code patterns)

An inline-declared loop counter scoped to the for loop itself (C++):

int sum = 0;
for (int i = 1; i <= 5; i++) {
  sum = sum + i;
}
cout << "Sum is " << sum;

✅ 검증 상태 및 신뢰도

• 상태: draft
• 검증 단계: conceptual
• 출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
• 신뢰 점수: 0.84
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: C++ Tutorial
• 관련 개념: CPP Do While Loop, CPP For Loop Foreach, C For Loop
• 참조 맥락: for 루프 — foreach 루프(For Loop Foreach) 챕터로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — C++ For Loop — https://www.w3schools.com/cpp/cpp_for_loop.asp

📝 변경 이력 (Change history)

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