**How to Import Maths Module in Python**

Maths module is already included with python installation.

To import any module in your program you must use:

import <modulename>

To import Math module write:

>>>import math

Example

>>> print(pi)

*NameError: name ‘pi’ is not defined*

**>>> import math**

>>> print(**math.pi**)

3.141592653589793

>>> print(pi)

*NameError: name ‘pi’ is not defined*

We must use math. before calling any method or variable of math module.

**>>> math.factorial(5) **# To calculate factorial

120

**>>> math.e **

2.718281828459045

**Typecasting in Python**

It is the process of changing one datatype to another data type.

Functions used to do typecasting.

**str(x)** – To change x to string

**int(x)** – To change x to integer ( x must be float or bool but not complex or string)

**float(x)** – To change x to float ( x must be int or boolean)

**complex(x)** – To change x to complex number. ( x must be numeric or bool)

**bool(x) – **To change values to True or False ( 1 is true and 0 is False )

Here x is the variable which has to be typecasted.

>>>X = “15” # Here x is string

>>>type(X)

<class ‘str’>

>>> print(int(X))

15 # X is now integer

**How to Take User Input in Python
**

We can take user input in python using the console window or we can also create GUI using python.

To create GUI windows in Python we use a library or module called Tkinter.

To take user input in python using console window we use and built in function called:

**input()**

**Example: **

**name = input(“Enter Name”)**

# Here **name** is the variable where we want to store of the value which user will enter in the console screen.

“Enter Name” is an instruction to user.

**input() function **creates string values only.

**Example : **

**name = input(“Enter Name”)**

**pwd = input(“Enter Password”)**

**if(name==”Mohan”):**

** print(“Welcome Mohan”)**

**if(pwd==”123″):**

** print(“Your Password is correct”)**

**else:**

** print(“You are not mohan”)**

Exercise : Create a program in python to calculate the area of a triangle.

*a=float(input(“enter a in cm”))*

*b=float(input(“enter b in cm”))*

*c=float(input(“enter c in cm”))*

*s=(a+b+c)/2*

*print(“area is ” ,(s*(s-a)*(s-b)*(s-c))**0.5, “cm^3”)*

*input()*

**Comparison Operators**

In programming comparison operators are used to compare two or more values. These are comparison operators used in Python.

**Equals To – “==”**

To check whether one value is equal to other value. The answer is returned in Boolean format.

Example:

>>> name = “Mohit” # Assignment

>>> name == “Mohit” # Comparison

**True** # Output

>>> x = 5 # Assigment

>>> 5 == x # Comparsion – LHS is equal to RHS here

**True**

** **

***Use of If Condition **

Syntax of if

**if(condition):**

** statement**

Example

>>> name = “Ramesh”

>>> if(name == “Ramesh”):

**#indentation block**

print(“Welcome Ramesh Babu”)

**Welcome Ramesh Babu **#output

- Greater than: “ > “

**>>> x = 67**

**>>> if(x > 65):**

** print(x, ” is greater than 65″)**

**67 is greater than 65**

**Example with With if and else : **

*x = 68*

*if(x > 65):*

* print(x , ” is g t 65 “)*

*else:*

* print(x , ” is ngt 65 “) *

*# 68 is g t 65*

**Greater than or equal to**

Example :

>>> t = 678 # assignment

>>> t >= 789 # comparison

**False** # output

>>> t >= 678

**True**

>>> t >= 677

**True**

**Less Than**

**>>> **cb = 56

>>> cb < 45

**False**

**Less than or equal to**

**>>> **cb = 56

>>> cb <= 56

**True**

>>> cb <= 78

**True**

** **

**Here are the Assignment Operators in Python Language
**

Assignment Operators are used to assign values to variables. In simple words, putting value in a variable. These values can be of any data type.

- Equal to Operator – ‘=’

Equal to operator is used to assign any value to a variable.

Example –

>>> x = 5

>>> name = ‘Mohit’

Here value of 5 (integer) is assigned to variable **x**

Value of Mohit (String type) is assigned to variable name.

Note – the value to be assigned (defined) should be written on right hand side of = sign.

Here x = 5 is correct but 5 = x is incorrect.

See an example:

>>> a = 65

>>> b = a

>>> print(b)

65

>>> u = 65

>>> u = v #Will raise Error

**Assignment with addition**

See Example

>>> x = 56

>>> x += 56

>>> print(x)

112

Here x + = 56 means x = x + 56

- Assignment with Subtraction

>>> g = 58

>>> g -= 8 **# g = g-8 | g = 58 – 8**

>>> print(g)

50

We are assigning a value of g – 8 to g itself.

- Assignment with multiplication

>>> a = 4

>>> a *= 5 **# a = a * 5 **

>>> print(a)

20

- Assignment with Division

>>> df = 45

>>> df /= 5 **# df = df / 5**

>>> print(df)

9.0

**Arithmetic Operators **

- Addition – ‘+’ – To Sum two or more numbers

**>>> x = 56**

**>>> y = 45**

**>>> x + y**

**101**

- Subtraction – ‘-’ – To Subtract two or more numbers

**>>> a = 345**

**>>> b = 123**

**>>> a – b**

**222**

- Multiplication – ‘*’ – To find the product of two or more numbers

**>>> u = 45**

**>>> v = 3**

**>>> u * v**

**135**

**>>> a * b * u**

**1909575**

- Division – ‘/’ – To divide two or more numbers. Answer is always a float.

** >>> people = 6**

**>>> quantity = 42**

**>>> quantity / people**

**7.0**

- Exponentiation – ‘**’ – To find y raised to power of x or vice versa.

**>>> x = 5**

**>>> y = 2**

**>>> y ** x**

**32**

**>>> x ** y**

**25**

- Modulus – ‘%’ – To find the remainder in any division.

**>>> x = 22**

**>>> y = 7**

**>>> x / y**

**3.142857142857143**

**>>> x % y # Finding the remainder **

**1**

**>>> 343 % 4**

**3**

- To Find Quotient in Division – ‘//’

**>>> 343 / 4 # Division **

**85.75**

**>>> 343 % 4 # Remainder **

**3**

**>>> 343 // 4 # Quotient**

**85**

**Operators in Python language**

Operators are used to perform specific actions in programming languages. Here are names of some common operator in Python:

- Arithmetic Operators ( Also known as math operators )
- Assignment Operators ( To assign values to variables )
- Comparison Operators ( To compare value of two or more variables )
- Logical Operators ( To combine multiple operations logically )

Variables are used to store values in Python. These variables can be used later on in the program for computing purpose.

Variables have a **name**, **value** and a **memory** location in computer.

For Example:

X = 56

Here X is the Variable Name and 56 is its value.

= is known as assignment operator.

The meaning of this statement is – A value 56 of integer datatype has been assigned to a variable named **X. **

Another Example :

>>> name = “Rohit”

Here variable name is *name*

Here value of variable is **“Rohit” **

**>>> type(name)**

**<class – str>**

How to Print a Variable

>>> print(name)

Output : **Rohit**

We can use variables to perform mathematical operations.

>>> x = 56

>>> y = 67

>>> print(x + y)

Output : **123 **

Variable values can also be changed.

>>> name = “Mohan”

>>> print(name)

Mohan

>>> name = “Sohan” # We have changed the previously assigned value.

>>> print(name)

Sohan

You can call variables – value-holder.

These values can be of any datatype.

**>>> # Valid Variable Names**

>>> first_name = “Mohan”

>>> FirstName = “Mohan”

>>> Firstname = “Mohan”

>>> firstName = “Mohan”

**>>> # Invalid Variable Names**

>>> first name = “Mohan” # using spaces is not allowed in variable names

SyntaxError: invalid syntax

>>> first-name = “Mohan” # using – sign means subtraction so it is not allowed

# No symbol is allowed except _ (underscore)

**>>> We cannot start a variable name with number**

>>> 1name = “Mohan” # invalid

>>> name1 = “Mohan” # valid

Tableau training is done by students and working professionals of Data Science industry.

Tableau is an easy to use tool to analyze data written in structured formats like JSON, Excel, CSV, XML, SQL etc.

Tableau is used to create interactive dashboards to visualize data in graphical and tabular form.

1. Tableau is a simple and easy to learn software tool for data analytics.

2. If you are new to coding or you dont know coding at all, you can start working on Tableau immediately.

3. Tableau helps in quick, creative and interactive databases.

4. Tableau can handle large datasets easily.

5. Tableau does the work of detecting the datatype in spreadsheets automatically. Datatypes like Strings, Numeric Values, Geographical Values etc. can be easily visualized using Tableau.

Domain name is the most important part of every website. Whether it’s about branding your business or making a mark in the digital world. It is the first thing that makes your mark in your digital marketing world. It is advisable to go through proper research and alterations before choosing the domain name. Here are few things to keep in mind before choosing a domain name.

One of the norms of Google for getting better result in SERP (Search engine result page) is to have your focused keyword in your domain.

For e.g.

If you are providing marketing services you can go for

**www.marketingbrand.com**

And for any specific location

**www.marketinginlucknow.com**

Domain name should be easy to remember and should be such that it positioned itself in the buying persona of consumer. This means that the spelling of the domain should be clear simple and short. Avoid using slangs for the domain.

e.g. **Marketingforyou.com** is much more meaningful than **marketing4you** or **marketingforu** or **marketing4u.**

Domain name should be meaningful that means it should represent your business in complete or specific manner.

e.g. : **Airtel** the word itself comprises of two words **Air** and **Tel (telecommunication)** which clearly explains the business of **Airtel company.**

Avoid using hyphen in domain as when we tell our website url to someone we only speak the words of the domain rather than mentioning the hyphen in the url.

e.g. : **digitalmarketinginlucknow** and **marketing-in-lucknow **both have same pronunciation.

.com for commerce

.net for technical

.in for specific to Indian region

.edu and .ac.in for educational purpose, etc for their specific purpose related to your business.

While choosing a domain name plan go thru the terms and conditions, pricing thoroughly. Check all the documentation and nameservers for ease in installation.

Finding the same name as Username in Social Media Marketing is also very important.