2nd/10_Wiki/Topics/Domain_Programming/Topic_CPP/CPP_Conditions.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-conditions	C++ If ... Else	Programming_Language	draft	conceptual		if statement lowercase if C++ 조건문		B	0.85	2026-07-04	2026-07-04			cpp programming-language w3schools conditions if-statement	https://www.w3schools.com/cpp/cpp_conditions.asp

CPP If ... Else

🎯 한 줄 통찰 (One-line insight)

Every rule from C's if chapter carries over verbatim — lowercase-only if (uppercase If/IF errors), the same six comparison operators, and the same bool-variable-for-readability pattern — meaning C++'s conditional syntax is a direct, unmodified continuation of C's, with the only visible difference being cout << replacing printf() inside the branches. [S1]

🧠 핵심 개념 (Core concepts)

• Six comparison conditions — <, <=, >, >=, ==, !=, identical to C. [S1]
• Four conditional constructs — if, else, else if, switch — same set as C. [S1]
• Case-sensitive keyword — if must be lowercase; If/IF produce an error. [S1]
• Boolean-variable readability pattern — storing a comparison's result in a bool variable before using it in if improves readability for complex/reused conditions. [S1]

📖 세부 내용 (Details)

• Basic if with variables: int x = 20; int y = 18; if (x > y) { cout << "x is greater than y"; }. [S1]
• Using a boolean variable to hold the condition: bool isGreater = x > y; if (isGreater) { cout << "x is greater than y"; }. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

• 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources). C 챕터와 동일한 규칙임이 확인됨.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 복잡하거나 재사용되는 조건을 bool 변수에 미리 담아두는 패턴이 가독성 있는 조건문 작성의 실전 관행이다. [S1]

💻 코드 패턴 (Code patterns)

Storing a condition in a readable boolean variable before using it in an if statement (C++):

int x = 20;
int y = 18;
bool isGreater = x > y;
if (isGreater) {
  cout << "x is greater than y";
}

✅ 검증 상태 및 신뢰도

• 상태: draft
• 검증 단계: conceptual
• 출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
• 신뢰 점수: 0.85
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: C++ Tutorial
• 관련 개념: CPP Booleans RealLife, CPP Conditions Else, C Conditions
• 참조 맥락: 조건문 섹션 첫 챕터 — else 문(Conditions Else) 챕터로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — C++ If ... Else — https://www.w3schools.com/cpp/cpp_conditions.asp

📝 변경 이력 (Change history)

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