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python-numbers Python Numbers Programming_Language draft conceptual
int float complex
파이썬 숫자
B 0.9 2026-07-04 2026-07-04
python
programming
w3schools
numbers
https://www.w3schools.com/python/python_numbers.asp

Python Numbers

🎯 한 줄 통찰 (One-line insight)

Python has three numeric types — unbounded-length int, decimal/scientific-notation float, and j-suffixed complex — freely convertible into each other except complex, which cannot convert into anything else. [S1]

🧠 핵심 개념 (Core concepts)

  • int — a whole number, positive or negative, without decimals, of unlimited length. [S1]
  • float — a number with one or more decimals; can also use scientific notation (e/E for powers of 10). [S1]
  • complex — written with a j suffix for the imaginary part (e.g. 3+5j). [S1]
  • Type conversionint(), float(), complex() convert between numeric types. [S1]
  • Complex is a one-way street — complex numbers cannot be converted into another number type. [S1]
  • Random numbers — Python has no built-in random() keyword, but the random module (random.randrange(1, 10)) generates them. [S1]

📖 세부 내용 (Details)

  • Basic declarations: x = 1 # int, y = 2.8 # float, z = 1j # complex. [S1]
  • Scientific notation floats: x = 35e3; y = 12E4; z = -87.7e100. [S1]
  • Conversion: a = float(x); b = int(y); c = complex(x). [S1]
  • Random number: import random; print(random.randrange(1, 10)). [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음. complex는 다른 타입으로 변환 불가하다는 예외가 명시적으로 강조됨. [S1]

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — random 모듈은 이후 여러 예제(리스트 셔플, 게임 로직 등)에서 재사용되는 표준 도구다. [S1]

💻 코드 패턴 (Code patterns)

Random number via the random module (Python):

import random
print(random.randrange(1, 10))

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)

📚 출처 (Sources)

📝 변경 이력 (Change history)

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