docs(10_Wiki): 위키 구조 정리 — 언어 튜토리얼 카테고리 폴더 제거 + 신규 자산 동기화

Topic_CSS/Topic_HTML/Topic_JavaScript/Topic_Prompt/Topic_Comfyui 등 기존 카테고리 폴더를 정리하고, Topic_Graphic/Dev 등 신규 산출물과 Topics 내부 세션/메모리 기록을 동기화.
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+---
+id: c-conditions-reallife
+title: "C If ... Else Examples"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["real-life if else", "even or odd example", "C 조건문 실전 예제"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.83
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["c", "programming-language", "w3schools", "conditions", "real-life-example"]
+raw_sources: ["https://www.w3schools.com/c/c_conditions_reallife.php"]
+applied_in: []
+github_commit: ""
+---
+
+# [[C If ... Else Examples]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+The even/odd checker reuses the `%` modulus operator from the Arithmetic Operators chapter for a purpose that has nothing to do with "remainder after division" in the everyday sense — `myNum % 2 == 0` is the standard idiom for parity checking, showing that modulus's real-world utility often lies in binary classification (even/odd, every-Nth) rather than literal division-remainder arithmetic. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **This chapter is a compilation** — six worked real-life if/else scenarios, consolidating patterns from every prior Conditions sub-chapter (basic if/else, else-if chains, nested if, logical operators). [S1]
+- **Door-code check** — a single `==` equality check gating access. [S1]
+- **Positive/negative/zero classification** — a three-way `if`/`else if`/`else` chain covering all three number sign cases. [S1]
+- **Even/odd via modulus** — `num % 2 == 0` is the standard parity-check idiom. [S1]
+- **Temperature banding** — a three-tier `if`/`else if`/`else` chain (freezing/cool/warm) based on numeric thresholds. [S1]
+
+## 📖 세부 내용 (Details)
+- Door code check: `int doorCode = 1337; if (doorCode == 1337) { printf("Correct code.\nThe door is now open."); } else { printf("Wrong code.\nThe door remains closed."); }`. [S1]
+- Positive/negative/zero: `int myNum = 10; if (myNum > 0) { printf("The value is a positive number."); } else if (myNum < 0) { printf("The value is a negative number."); } else { printf("The value is 0."); }`. [S1]
+- Even/odd check: `int myNum = 5; if (myNum % 2 == 0) { printf("%d is even.\n", myNum); } else { printf("%d is odd.\n", myNum); }`. [S1]
+- Temperature banding: `int temperature = 30; if (temperature < 0) { printf("It's freezing!\n"); } else if (temperature < 20) { printf("It's cool.\n"); } else { printf("It's warm.\n"); }`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources).
+
+## 🛠️ 적용 사례 (Applied in summary)
+도어락 코드 확인, 숫자 부호 판별, 짝/홀수 판별, 온도 구간 분류, 접근 제어 등 6가지 실전 시나리오가 원문에서 직접 제시되며, 각각이 조건문 섹션 전체를 종합한 실전 활용 사례다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+The standard parity-check idiom using the modulus operator (C):
+```c
+int myNum = 5;
+if (myNum % 2 == 0) {
+  printf("%d is even.\n", myNum);
+} else {
+  printf("%d is odd.\n", myNum);
+}
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.83
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[C Tutorial]]
+- **관련 개념:** [[C Conditions Nested]], [[C Operators Arithmetic]], [[C Switch]]
+- **참조 맥락:** 조건문 섹션 마지막 — switch 문(Switch) 섹션으로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — C If ... Else Examples — https://www.w3schools.com/c/c_conditions_reallife.php
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "C If ... Else Examples" page (Astra wiki-curation, P-Reinforce v3.1 format).