Python is a case sensitive language. So when you define a variable you should consider the uppercase and lowercase.

eg: price = 10 is different to PRICE = 10

Important Variable Types and Declaration

price = 10
# price variable type is INTEGER
# price is an identifier for variable and initialised with the value 10

update_price = 20.5
# update_price variable type is FLOAT

is_published = True
# is_published variable type is BOOLEAN
# either True or False (case sensitive first letter should be capital)

name = 'Jasim'
# name variable type is STRING

# – is a comment line. Python interpreted not read this line.

Let’s do one small task.
Variable Declaration Task: We check in a patient named John Toe. He’s 20 years old and is a new patient.

name = 'John Toe'
Age = 20
is_new_patient = True

As of now we successfully learn how to declare the variable in python. Next, we learn about how to get input from users.

Instead of print() method use input() method to get the input from the user.

Filename: app.py

name = input('What is your name? ')
print('Hey! ' + name)

Task 2: Ask two questions – Person’s name and his favorite color. Print the output like “John Toe like violet”.

name = input('What is your name? ')
Color = input('what is your favourite color? ')
print(name + ' like ' + color);

Type conversion

Type conversion is used to define a variable for calculation. If the number is in string format we need to convert the number string into the integer type.

Example:

birth_year = input('Your birth year? ')
print(type(birth_year))
age = 2020 - birth_year
print('Your age is ' + age)

You get input from the terminal 1994 and the type of 1994 is string identified with the use of type() method.

You get an error in line 20 in the app.py file. It will be shown in the terminal due to the type differentiation. So how to solve this problem. We need to convert the type from string to integer.

How to convert the string to integer

int() – method is used to convert the typed string to an integer.
str() – method is used to convert the integer type to string type.

Solution:

birth_year = input('Your birth year? ')
print(type(birth_year))
age = 2020 - int(birth_year)
print('Your age is ' + str(age))

In the next article let see the strings in python. Go the next continuation on the menu.

Open your PyCharm or your favorite IDE. Click to create a new project and name your project.

Give your project name and check the base interpreter has the current version. If you need another version, you can select the other version from the list.

Create a first python program

Name your file. In my case app.py

Now let’s start to learn the code first.

How to console or print the value in the python

file name: app.py

print('Hi! welcome to helperscript');

print(data) => print function helps to print or console in terminal output. It is used to identify whether the data passed are correct or incorrect.

data => you can pass data that you want to output. When your data is a string. String declaration with a single quote or either double quote.

Eg: print(“hello”) is equal to print(‘hello’)
Then Run the app.py file from the menu Run. It will show configuration settings. As of now we just run the file. So just click on the app.

After Run the app.py file. The below terminal will open and show the output like below.

Python code gets executed line by line from the top.

Print the string with the multiplication

file name: app.py

print('Hi! welcome to helperscript')
print('*' * 5)

In python, the String data type can be generated and printed multiple times with an asterisk.

So the python is powerful for AI, Automation, desktop application, and web application. 

Let us see more new topics in python in the next article. Go to the menu of Python and find the next tutorial for continuation…