Python - Making Choices(absolute value, built-in function(abs)

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 5(Making Choices)、5.6(Exercises) 5.を解いてみる。

5.6(Exercises) 5.

コード(BBEdit)

sample5.py

\
#!/usr/bin/env python3
#-*- coding: utf-8 -*-

def f(x):
    # expression
    result = x == abs(x)
    return result

for x in range(-5, 6):
    result = f(x)
    print('{0}: {1}'.format(x, result))

入出力結果(Terminal, IPython)

$ ./sample5.py
-5: False
-4: False
-3: False
-2: False
-1: False
0: True
1: True
2: True
3: True
4: True
5: True
$