Python - Hello, Python(Expressions and Values: Arithmetic)

Practical Programming
An Introduction to Computer Science
Using Python 3
(Pragmatic Programmers)
(Pragmatic Bookshelf)
Paul Gries (著) Jennifer Campbell (著)
Jason Montojo (著) Lynn Beighley (編集)

開発環境

• OS X Mavericks - Apple(OS)
• Emacs (CUI)、BBEdit - Bare Bones Software, Inc. (GUI) (Text Editor)
• Python 3.4 (プログラミング言語)

Practical Programming: An Introduction to Computer Science Using Python 3 (Pragmatic Programmers) (Paul Gries (著)、Jennifer Campbell (著)、Jason Montojo (著)、Lynn Beighley (編集)、Pragmatic Bookshelf)のChapter 2(Hello, Python)、2.10-1.を解いてみる。

2.10-1.

入出力結果(Terminal, IPython)

$ ipython
Python 3.4.1 (default, May 21 2014, 01:39:38) 
Type "copyright", "credits" or "license" for more information.

IPython 2.1.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]: 9 - 3 # 6
Out[1]: 6

In [2]: 8 * 2.5 # 20.0
Out[2]: 20.0

In [3]: 9 / 2 # 4.5
Out[3]: 4.5

In [4]: 9 / -2 # -4.5
Out[4]: -4.5

In [5]: 9 // -2 # -5
Out[5]: -5

In [6]: 9 % 2 # 1
Out[6]: 1

In [7]: 9.0 % 2 # 1.0
Out[7]: 1.0

In [8]: 9.0 % 2 # 1.0
Out[8]: 1.0

In [9]: 9 % 2 # 1
Out[9]: 1

In [10]: 9 % 2.0 # 1.0
Out[10]: 1.0

In [11]: 9 % -2 # -1
Out[11]: -1

In [12]: -9 % 2 # 1
Out[12]: 1

In [13]: 9 / -2.0 # - 4.5
Out[13]: -4.5

In [14]: 4 + 3 * 5 # 19
Out[14]: 19

In [15]: (4 + 3) * 5 # 35
Out[15]: 35

In [16]: quit()
$