2nd/10_Wiki/Dev/Topic_Python/Python_Operators_Arithmetic.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
python-operators-arithmetic	Python Operators Arithmetic	Programming_Language	draft	conceptual		Arithmetic Operators 파이썬 산술 연산자		B	0.9	2026-07-04	2026-07-04			python programming w3schools operators arithmetic	https://www.w3schools.com/python/python_operators_arithmetic.asp

Python Operators Arithmetic

🎯 한 줄 통찰 (One-line insight)

Python has two distinct division operators — / always returns a float, while // (floor division) always returns an integer, rounding DOWN rather than to the nearest whole number. [S1]

🧠 핵심 개념 (Core concepts)

• Arithmetic operators — + addition, - subtraction, * multiplication, / division, % modulus, ** exponentiation, // floor division. [S1]
• / vs // — / returns a float; // returns an integer, rounded down (not to nearest). [S1]

📖 세부 내용 (Details)

• All operators demoed: x = 15; y = 4; print(x + y); print(x - y); print(x * y); print(x / y); print(x % y); print(x ** y); print(x // y). [S1]
• Division always float: x = 12; y = 5; print(x / y) # 2.4. [S1]
• Floor division rounds down: print(x // y) # 2. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 이후 Operator Precedence 챕터에서 이 연산자들의 우선순위가 정의된다. [S1]

💻 코드 패턴 (Code patterns)

Division vs floor division (Python):

x = 12
y = 5
print(x / y)   # 2.4  (float)
print(x // y)  # 2    (int, rounds down)

✅ 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 Operators, Python Operators Precedence, Python Numbers
• 참조 맥락: 기본 산술 연산 — 나눗셈의 두 가지 방식(/ vs //)을 반드시 구분해야 한다.

📚 출처 (Sources)

• [S1] W3Schools — Python Arithmetic Operators — https://www.w3schools.com/python/python_operators_arithmetic.asp

📝 변경 이력 (Change history)

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