Understanding ASCII Values For Characters Using Python

ASCII Values For Capital Letters

A = 65

B = 66

C = 67

D = 68

E = 69

F = 70

G = 71

H = 72

I = 73

J = 74

K = 75

L = 76

M = 77

N = 78

O = 79

P = 80

Q = 81

R = 82

S = 83

T = 84

U = 85

V = 86

W = 87

X = 88

Y = 89

Z = 90

ASCII Values For Small Letters

a = 97

b = 98

c = 99

d = 100

e = 101

f = 102

g = 103

h = 104

i = 105

j = 106

k = 107

l = 108

m = 109

n = 110

o = 111

p = 112

q = 113

r = 114

s = 115

t = 116

u = 117

v = 118

w = 119

x = 120

y = 121

z = 122

ASCII

>>> ord('A')

65

>>> ord('Z')

90

>>> ord('a')

97

>>> ord('z')

122

Captital A-Z: 65 to 90

>>> l = ['r', 'u', 'd', 'r', 'a', 'n', 's', 'h']

>>> max(l)

'u'

>>> ord('u')

117

>>> min(l)

'a'

>>> ord('a')

97

>>> bin(65)

'0b1000001'

>>> bin(66)

'0b1000010'

>>>

Bit #	7	6	5	4	3	2	1	0
A	0	1	0	0	0	0	0	1
B	0	1	0	0	0	0	1	0

One usecase of ASCII:

For storing in a memory of an 8 bit computer, we need to convert Alphabet to Decimal then Decimal to Binary.

A -> 65 -> 01000001

B -> 66 -> 01000010

ord() and chr()

• Here, ord() and chr() are built-ins.
• Ord(): gives you ASCII for the alphabet
• Chr(): gives you the alphabet for the ASCII
• >>> ord('A')
• 65
• >>> chr(65)
• 'A'

Unicode

Unicode, formally The Unicode Standard, is an information technology standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems.

Binary	Base 2	0, 1
Decimal	Base 10	0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Hexadecimal	Base 16	0-9 then A-F

Tags: Python,Technology,