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In this series of blogs we will learn python , But in a smart way, I mean by smart way  learning  python learning deep with basics and learn only needful things that we are going to implement in future project and in more practical manner. Here I discussed about Installing Python and Starting IDLE . Lets start with Numbers and Strings.

Numbers  :-

We will learn about following topics :- 1. Type of Number in Python. 2. Arithmetic operations. 3. Assignment of Object

Type of Number in Python :-

In python , We have lots of type of numbers,  I will mainly discuss about Integers and Floating point numbers. Integer example is  1. –2 etc and Floating point number is 3.01 etc. Basic Operations example :

Arithmetic operations:-

Note : In python 2, If you divide 3/2 you will get the integer by in python 3 you will get the float value. In you have python 2 installed , You can import division module from  “__future__” to get the Floating point number.

Assignment of Object:-

In python , Lets create some variables, In python we can assign any data type  to a variables that why I love python most. Using print(“ ”) function to print values e.g variables in the below image. The names you use when creating these labels need to follow a few rules:

1. Names can not start with a number.
2. There can be no spaces in the name, use _ instead.
3. Can’t use any of these symbols :'”,<>/?|\()!@#$%^&*~-+.
4. It’s considered best practice (PEP8) that the names are lowercase.

Strings :-

Lets learn following topics in strings.

1. Creating & Printing Strings
2. String Indexing and Slicing
3. String Properties &  Methods
4. Formatting Print

Creating & Printing Strings

String Indexing and Slicing

We can use a : to perform slicing which grabs everything up to a designated point. Note :  The slicing Here we’re telling Python to grab everything from 1 up to 2. It doesn’t include the 2rd index. You’ll notice this a lot in Python, where statements and are usually in the context of “up to, but not including”.

We can also use index and slice notation to grab elements of a sequence by a specified step size (the default is 1). For instance we can use two colons in a row and then a number specifying the frequency to grab elements. For example: # Grab everything, but go in steps size of 1. # Grab everything, but go in steps size of 2 # We can use this to print a string backwards by (-1) String Properties &  Methods Its important to note that strings have an important property known as immutability. s = ‘Hello World’ # Let’s try to change the first letter to ‘x’ s[0] = ‘x’ Formatting Print That’s all folks , In next series we will learn about List, Dictionaries and Tuples.