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---
id: cpp-operators-logical
title: "C++ Logical Operators"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["&& || !", "logical AND OR NOT", "C++ 논리 연산자"]
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: ["cpp", "programming-language", "w3schools", "operators", "logical"]
raw_sources: ["https://www.w3schools.com/cpp/cpp_operators_logical.asp"]
applied_in: []
github_commit: ""
---
# [[CPP Logical Operators]]
## 🎯 한 줄 통찰 (One-line insight)
The source labels these results "true (1) or false (0)" in the SAME breath, explicitly pairing the boolean word with its integer representation — a small but telling detail showing C++ treats `true`/`false` as just readable NAMES for the underlying 1/0 values rather than a genuinely distinct data representation, consistent with the Comparison Operators chapter's finding. [S1]
## 🧠 핵심 개념 (Core concepts)
- **`&&` (AND)** — returns true only if BOTH statements are true. [S1]
- **`||` (OR)** — returns true if AT LEAST ONE statement is true. [S1]
- **`!` (NOT)** — reverses the result. [S1]
- **True(1)/False(0) duality** — the source explicitly writes results as "true (1) or false (0)," reinforcing that boolean values ARE their integer representation, not a separate concept. [S1]
## 📖 세부 내용 (Details)
- The three operators listed with example expressions: `x < 5 && x < 10` (AND), `x < 5 || x < 4` (OR), `!(x < 5 && x < 10)` (NOT). [S1]
## ⚖️ 모순 및 업데이트 (Contradictions & updates)
- 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources).
## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 이 챕터가 소개하는 세 논리 연산자가 이후 조건문 내 논리 연산(Conditions Logical) 챕터의 실전 응용으로 이어진다. [S1]
## 💻 코드 패턴 (Code patterns)
Combining two conditions with logical AND (C++):
```cpp
int x = 4;
cout << (x < 5 && x > 2); // 1 (true) — both conditions hold
```
## ✅ 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:** [[CPP Operators Comparison]], [[CPP Operators Precedence]], [[CPP Conditions Logical]]
- **참조 맥락:** 논리 연산자 — 연산자 우선순위(Operators Precedence) 챕터로 이어짐.
## 📚 출처 (Sources)
- [S1] W3Schools — C++ Logical Operators — https://www.w3schools.com/cpp/cpp_operators_logical.asp
## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "C++ Logical Operators" page (Astra wiki-curation, P-Reinforce v3.1 format).