2nd/10_Wiki/Dev/Topic_Java/Java_For_Loop.md

id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit

id	title	category	status	verification_status	canonical_id	aliases	duplicate_of	source_trust_level	confidence_score	created_at	updated_at	review_reason	merge_history	tags	raw_sources	applied_in	github_commit
java-for-loop	Java For Loop	Programming_Language	draft	conceptual		for loop 자바 for 반복문		B	0.9	2026-07-04	2026-07-04			java programming w3schools loops for	https://www.w3schools.com/java/java_for_loop.asp

Java For Loop

🎯 한 줄 통찰 (One-line insight)

Choose for over while specifically when the iteration count is known in advance — the tutorial frames this as the deciding factor between the two loop types, since a for loop bundles init/condition/increment into one line while while requires manual setup outside the loop. [S1]

🧠 핵심 개념 (Core concepts)

• for (statement1; statement2; statement3) { ... } — statement1 runs once before the loop, statement2 is the continuation condition, statement3 runs after each iteration. [S1]
• When to use for vs while — for loop is preferred when the exact iteration count is known ahead of time. [S1]
• False condition from the start — like while, a for loop with a false initial condition skips the body entirely. [S1]

📖 세부 내용 (Details)

• Print 0-4: for (int i = 0; i < 5; i++) { System.out.println(i); }. [S1]
• Even numbers: for (int i = 0; i <= 10; i = i + 2) { System.out.println(i); }. [S1]
• Sum 1-5: int sum = 0; for (int i = 1; i <= 5; i++) { sum = sum + i; } System.out.println("Sum is " + sum);. [S1]
• Countdown: for (int i = 5; i > 0; i--) { System.out.println(i); }. [S1]
• Never runs: for (int i = 10; i < 5; i++) { System.out.println("This will never be printed"); }. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 합계 계산, 카운트다운 등 반복 횟수를 미리 아는 상황의 표준 도구다. [S1]

💻 코드 패턴 (Code patterns)

Sum accumulation with for loop (Java):

int sum = 0;
for (int i = 1; i <= 5; i++) {
    sum = sum + i;
}
System.out.println("Sum is " + sum);

✅ 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: Java Tutorial
• 관련 개념: Java While Loop, Java For Loop Nested, Java For Each Loop, Java For Loop Real Life
• 참조 맥락: 반복 횟수를 아는 경우의 표준 반복문 — 중첩/for-each로 확장됨.

📚 출처 (Sources)

• [S1] W3Schools — Java For Loop — https://www.w3schools.com/java/java_for_loop.asp

📝 변경 이력 (Change history)

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