python-for-informatics/ch02/04.py at master · epequeno/python-for-informatics · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
# -*- coding: utf-8 -*-
"""
Created on Tue Jul 22 13:51:17 2014

@author: Estevan Adrian Pequeno
"""

'''
Assume that we execute the following assignment statements:


width = 17
height = 12.0

For each of the following expressions, write the value of the expression and
the type (of the value of the expression).

1. width/2

2. width/2.0

3. height/3

4. 1 + 2 * 5 #Does the text of the PDF have a typo?  Reads 1 + 2 \* 5.  Severance, Charles. Python for Everybody: Exploring Data in Python 3 (Kindle Location 574). Kindle Edition.

Use the Python interpreter to check your answers.
'''

'''
1. Since width is an int dividing it by 2 will give floor division which would
   be between 16/2 = 8 and 18/2 = 9 so ~8

   In [11]: width/2
   Out[11]: 8

2. Since we are now dividing by 2.0 a float, we will get a float as a result.
   ~8.5

   In [12]: width/2.0
   Out[12]: 8.5

3. height is already a float so dividing by 3 (int) will still produce a float
   as an answer 4.0

   In [13]: height/3
   Out[13]: 4.0

4. Following PEMDAS multiplication takes precedent so 2*5 is computed first
   giving 10 then added to 1 producing 11

   In [14]: 1 + 2 * 5
   Out[14]: 11
'''