Basic Concepts of Python | Literal's & Unicode Encoding

Python Literal's & Unicode Encoding

At this page we are going to look at Literals & Unicode Encoding. If you guys wanna check out previous basic concepts such as Variable's & Datatypes go check out my previous post.

3.) Literal's :

Literal's are sequence of characters that means/stands for itself.

eg:

Numbers : 5,10,15,8.9

Strings    : "Hello",'World'

Boolean  : True,False

Now basically there are different types of literals :

1. Integer
2. Float
3. String
4. Boolean

(i) Integer Literal's :

• Sequence of digit without decimal points.
• Optionally we can use signs i.e (+/-).
• No other special characters are allowed. 

eg :

x = 25                ✔

y = +25              ✔

z = 25550           ✔

a = 12.5              ✘

b = 12,000          ✘

c =  $500            ✘

(ii) Floating Point Literal's :

• Will be real numbers ( will have decimal point ).
• Optionally we can use signs i.e (+/-).
• Floating point value in python are double precision i.e they have 16 to 17 digits of precision in expressing a decimal number.
• The range of floating points is 10^(-308) to 10^(308).
• The floating point can be expressed in 2 form :

       a.) Decimal / scientific notation : 25.36987

       b.) Exponential notation : if the number is " 2.5 x 10^(-3) " we express it as 2.5e^(-3)

(iii) String Literal's : 

String literal's are sequence of character enclosed in either 'single_quotes' or "double_quotes".

eg : 'Home',"Hello"

(iv) Boolean Literals :

There are 2 boolean values i.e True & False. But not true & false remember python is case sensitive.

4.) Unicode Encoding :

Encoding some used for representing characters in a computer system.

Capital Alphabets : A → 65 , B → 66 , ... , Z → 90

Small Alphabets   : a → 97 ,  b → 98 , ... , z → 122

Numbers               : 0 → 48 , 1 → 49 , ... , 9 → 57

space                     : 32

Special character  : 37 , ... , 47

There are 2 functions to use unicode encoding :

(i)  ord()  → order

(ii) chr()  → character