Python - Introducing Python Object Types(Types and Operations(Numeric Types(math module(sqrt, trunc, floor), built-in functions(pow, type, round, int, float, oct, hex, bin))))

Learning Python
(Oreilly & Associates Inc)
Mark Lutz (著)
(邦訳版)

開発環境

• OS X Mavericks - Apple(OS)
• Emacs (CUI)、BBEdit - Bare Bones Software, Inc. (GUI) (Text Editor)
• Python (プログラミング言語)

Learning Python (Mark Lutz (著)、Oreilly & Associates Inc)のPART II.(Types and Operations)、CHAPTER 5(Numeric Types)、Test Your Knowledge: Quiz 1, 2, 3, 4, 5, 6, 7, 8, 9を解いてみる。

その他参考書籍

• Pythonチュートリアル 第2版
• Python クックブック 第2版 (原書(最新版))

Test Your Knowledge: Quiz 1, 2, 3, 4, 5, 6, 7, 8, 9

入出力結果(Terminal)

$ python3
Python 3.3.3 (default, Dec  2 2013, 01:40:21) 
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.2.79)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> 2 * (3 + 4) # 14
14
>>> 2 * 3 + 4 # 10
10
>>> 2 + 3 * 4 # 14
14
>>> import math
>>> math.sqrt(4)
2.0
>>> math.sqrt(2)
1.4142135623730951
>>> 2 ** 2
4
>>> pow(2, 2)
4
>>> type(1 + 2.0 + 3) # float
<class 'float'>
>>> round
<built-in function round>
>>> round(1.4)
1
>>> round(1.5)
2
>>> dir(math)
['__doc__', '__file__', '__loader__', '__name__', '__package__', 'acos', 'acosh', 'asin', 'asinh', 'atan', 'atan2', 'atanh', 'ceil', 'copysign', 'cos', 'cosh', 'degrees', 'e', 'erf', 'erfc', 'exp', 'expm1', 'fabs', 'factorial', 'floor', 'fmod', 'frexp', 'fsum', 'gamma', 'hypot', 'isfinite', 'isinf', 'isnan', 'ldexp', 'lgamma', 'log', 'log10', 'log1p', 'log2', 'modf', 'pi', 'pow', 'radians', 'sin', 'sinh', 'sqrt', 'tan', 'tanh', 'trunc']
>>> math.trunc(1.4)
1
>>> math.trunc(1.5)
1
>>> int(1.4)
1
>>> int(1.5)
1
>>> math.floor(1.4)
1
>>> math.floor(1.5)
1
>>> float(1)
1.0
>>> 1/1.0
1.0
>>> oct(8)
'0o10'
>>> hex(16)
'0x10'
>>> bin(2)
'0b10'
>>> int('10', 8)
8
>>> int('10', 16)
16
>>> int('10', 2)
2
>>> quit()
$