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Antigravity Agent e9cbf23ab5 docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

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title

C Else

🎯 한 줄 통찰 (One-line insight)

Naming a boolean condition variable descriptively (isDay instead of a raw time < 18 expression) doesn't change the program's behavior at all — it's purely a communication device for future readers — and the source explicitly frames this as its entire justification: "makes it easy to understand what the condition means," not a performance or correctness improvement. [S1]

🧠 핵심 개념 (Core concepts)

else — runs a block of code when the paired if condition is false; there is no separate condition to check for else itself. [S1]
Mutually exclusive branches — exactly one of the if or else block executes, never both, never neither. [S1]
Descriptive boolean naming — storing a condition in a variable like isDay documents the condition's MEANING, not just its mechanics. [S1]

📖 세부 내용 (Details)

Basic if/else: int time = 20; if (time < 18) { printf("Good day."); } else { printf("Good evening."); } // Outputs "Good evening.". [S1]
Same logic with a descriptively-named boolean: bool isDay = time < 18; if (isDay) { printf("Good day."); } else { printf("Good evening."); }. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

현재까지 발견된 모순 사항 없음 (No contradictions found in available sources).

🛠️ 적용 사례 (Applied in summary)

시간(time)이 18보다 작은지에 따라 "좋은 하루"/"좋은 저녁"을 출력하는 예제가 원문에서 직접 실전 활용 사례로 제시됨(시간대 기반 인사말 로직). [S1]

💻 코드 패턴 (Code patterns)

Naming a boolean condition descriptively for readability (C):

int time = 20;
bool isDay = time < 18;
if (isDay) {
  printf("Good day.");
} else {
  printf("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: 0.84
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: C Tutorial
관련 개념: C Conditions, C Conditions ElseIf
참조 맥락: else 문 — else if 문(Conditions ElseIf) 챕터로 이어짐.

📚 출처 (Sources)

[S1] W3Schools — C Else — https://www.w3schools.com/c/c_conditions_else.php

📝 변경 이력 (Change history)

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

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