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10_Wiki/Dev/Topic_Python/Python_Output_Variables.md

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+---
+id: python-output-variables
+title: "Python Output Variables"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["파이썬 변수 출력"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.88
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["python", "programming", "w3schools", "variables", "print"]
+raw_sources: ["https://www.w3schools.com/python/python_variables_output.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[Python Output Variables]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+Multiple variables can be printed together via comma (which handles mixed types safely) or `+` (which requires matching types and fails on string+number mixes). [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Comma-separated print** — `print(x, y, z)` outputs multiple variables. [S1]
+- **`+` operator concatenation** — `print(x + y + z)` also combines variables, but only works if types match. [S1]
+- **`+` on numbers** — acts as addition, not concatenation, when operands are numeric. [S1]
+- **Type mismatch error** — `print(x + y)` where `x` is a number and `y` is a string raises an error. [S1]
+- **Comma is the safe default** — commas support different data types simultaneously, unlike `+`. [S1]
+
+## 🧩 추출된 패턴 (Extracted patterns)
+- **Comma vs. plus trade-off** — comma auto-adds a space and tolerates mixed types; `+` requires manual spacing and same-type operands, but is needed when you want no separating space at all (by omitting it) or true numeric addition. [S1]
+
+## 📖 세부 내용 (Details)
+- Comma-separated output: `x = "Python"; y = "is"; z = "awesome"; print(x, y, z)`. [S1]
+- Plus-concatenated output (same type): `print(x + y + z)`, noting trailing spaces must be added manually in each string. [S1]
+- Plus as addition (numbers): `x = 5; y = 10; print(x + y)`. [S1]
+- Type mismatch error: `x = 5; y = "John"; print(x + y)` fails. [S1]
+- Safe mixed-type output: `print(x, y)` where `x=5` and `y="John"`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+소스에서 모순되는 정보는 발견되지 않음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 이후 문자열 포맷팅(f-string 등) 챕터에서 더 정교한 출력 방식이 다뤄진다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Safe mixed-type output via comma (Python):
+```python
+x = 5
+y = "John"
+print(x, y)
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.88
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[Python Tutorial]]
+- **관련 개념:** [[Python Output]], [[Python Variables]], [[Python String Formatting]]
+- **참조 맥락:** 변수를 출력할 때 콤마 vs + 연산자 선택 기준.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — Python - Output Variables — https://www.w3schools.com/python/python_variables_output.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "Python - Output Variables" page (Astra wiki-curation, P-Reinforce v3.1 format).