---
id: cpp-while-loop
title: "C++ While Loop"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["while statement", "C++ while 반복문"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.84
created_at: 2026-07-04
updated_at: 2026-07-04
review_reason: ""
merge_history: []
tags: ["cpp", "programming-language", "w3schools", "loops", "while"]
raw_sources: ["https://www.w3schools.com/cpp/cpp_while_loop.asp"]
applied_in: []
github_commit: ""
---

# [[CPP While Loop]]

## 🎯 한 줄 통찰 (One-line insight)
Just as with C, the same explanation for why `i` is the traditional loop-counter name (short, traditional, stands for "index"/"iterator") is repeated verbatim — confirming this naming convention is treated as universal programming culture the tutorial deliberately re-teaches in every language, not something assumed to already be known from a prior language chapter. [S1]

## 🧠 핵심 개념 (Core concepts)
- **`while (condition) { ... }`** — repeats the block as long as the condition remains true, checked before each iteration. [S1]
- **Mandatory condition-variable update** — forgetting to change the loop-controlling variable causes an infinite loop. [S1]
- **`i` as a counter convention** — short, traditional, stands for "index"/"iterator." [S1]

## 📖 세부 내용 (Details)
- Basic counting loop: `int i = 0; while (i < 5) { cout << i << "\n"; i++; }`. [S1]
- Countdown loop: `int countdown = 3; while (countdown > 0) { cout << countdown << "\n"; countdown--; } cout << "Happy New Year!!\n";`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
- 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources). C 챕터와 동일한 while 루프 문법 및 카운터 관례가 확인됨.

## 🛠️ 적용 사례 (Applied in summary)
카운트다운 후 "Happy New Year!!"를 출력하는 예제가 C 챕터와 동일하게 실전 활용 사례로 제시됨. [S1]

## 💻 코드 패턴 (Code patterns)
A basic counting while loop (C++):
```cpp
int i = 0;
while (i < 5) {
  cout << i << "\n";
  i++;
}
```

## ✅ 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 Switch]], [[CPP While Loop RealLife]], [[C While Loop]]
- **참조 맥락:** 반복문 섹션 첫 챕터 — while 루프 실전 예제(While Loop RealLife) 챕터로 이어짐.

## 📚 출처 (Sources)
- [S1] W3Schools — C++ While Loop — https://www.w3schools.com/cpp/cpp_while_loop.asp

## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "C++ While Loop" page (Astra wiki-curation, P-Reinforce v3.1 format).