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2026-07-05 00:39:13 +09:00

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title

Python While Loops

🎯 한 줄 통찰 (One-line insight)

A while loop's else block runs once when the condition becomes false naturally — but NOT if the loop was exited early via break, making else a way to distinguish "loop completed" from "loop was interrupted". [S1]

🧠 핵심 개념 (Core concepts)

while loop — executes statements as long as a condition is true. [S1]
Manual increment required — forgetting to update the loop variable causes an infinite loop. [S1]
break — stops the loop even if the condition is still true. [S1]
continue — stops the current iteration and continues with the next. [S1]
else — runs once when the condition becomes false; does NOT run if the loop was stopped by break. [S1]

🧩 추출된 패턴 (Extracted patterns)

else as "completed without break" signal — since the else block is skipped specifically when a break fired, it's a built-in way to detect whether a while loop ran to natural completion versus being interrupted. [S1]

📖 세부 내용 (Details)

Basic loop: i = 1; while i < 6: print(i); i += 1. [S1]
Break: while i < 6: print(i); if i == 3: break; i += 1 — stops at 3. [S1]
Continue: while i < 6: i += 1; if i == 3: continue; print(i) — skips printing 3. [S1]
Else (runs on natural completion): while i < 6: print(i); i += 1; else: print("i is no longer less than 6"). [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음. else가 break로 종료될 경우 실행되지 않는다는 예외가 명시적으로 강조됨. [S1]

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — Python For Loops 챕터에서 동일한 break/continue/else 패턴이 재사용된다. [S1]

💻 코드 패턴 (Code patterns)

else runs only if the loop completes without break (Python):

i = 1
while i < 6:
    print(i)
    i += 1
else:
    print("i is no longer less than 6")

✅ 검증 상태 및 신뢰도

상태: draft
검증 단계: conceptual
출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
신뢰 점수: 0.90
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: Python Tutorial
관련 개념: Python For Loops, Python If Statement
참조 맥락: Python 2대 반복문 중 하나 — break/continue/else 패턴이 For Loops에서도 재사용된다.

📚 출처 (Sources)

[S1] W3Schools — Python While Loops — https://www.w3schools.com/python/python_while_loops.asp

📝 변경 이력 (Change history)

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

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