The Littleendian Method

87

128    0    87
64     1    23
32     0    23
16     1     7
8      0     7
4      1     3
2      1     1
1      1     0


0b1010111

87

87      *1
43      *11
21      *111
10      *0111
5       *10111
2       *010111
1       *1010111
0       1010111

87   87%5 = 2     *2
17   17%5 = 2     *22
3    3%5  = 3     *322
0                 322

3*25 + 2*5 + 2 = 75 + 10 + 2 = 87

Packing-Unpacking Procedure

117

base 2:  0b1110101
base 8:  0o165

Packing:  break into 3s fromthe little end.
1 110 101 
Translate the pieces into octal

1 6  5 → 0o165

0o165

001 110 101

Hexadecimal number (base 16)

{0, 1, 2, 3,4, 5, 6, 7, 8, 9, A, B, C, D, E, F}  alphabet


0b1011010101010110


0b 1011 0101 0101 0110
    B     5    5   6   → 0xB556.

0xB64

  B    6    4
1011 0110  01000

0b101101100100

A Base Changing Practicepalooza

Hex Numbers and Colors Download colorDemo.zip from the navigation bar on the left. Decompress it and open the files with VSCode. Look in the CSS file, and you will see this.

/*Author: Morrison*/
h1, h2, .display
{
    text-align:center;
}
body
{
    background-color:#FFFFFF;
}

Change the 6-digit hex number inside of the body style rule. Then, in your browser, choose File → Open... and open the HTML file. Let's pool our knowledge.

Playing with Pythons

What is an object? An object is an item stored in memory. Objects have three attributes.

• state: This is what an object KNOWS.
• identity: This is what an object IS.
• behavior: This is what an object DOES.

All data in Python are represented as objects. Python, like every other language, has a type ecosystem. In this portion of the course, we will being by learning about Python's scalar types. Later, we will address sequences, sets, and dictionaries.

The Number Types