We will learn here how to write and run python programs. Before you start, you should have Python installed on your computer.

Install Python and IDLE

Python comes pre-installed with Ubuntu and Mac OS, but it does not come pre-installed with the Windows operating system. You need to download and install manually from the official website of python https://www.python.org/downloads/. and install it in very simple steps.

IDLE: Python IDLE (Integrated development and learning environment ) is an integrated environment for python programming. IDLE is a simple IDE and suitable for beginners and an educational environment. For window users, it is a part of the python software, you need not install it separately. For Linux user, run below command in Terminal.

sudo apt-get install python3 idle3.

Python Version Check

Run below command from terminal or cmd to check python installed on your PC and version of python.

python --version

Working in Python.

Now python is installed in your PC, and you are ready to work with python environment. You can work in Python in two different ways.

• Interactive mode
• Script mode

Interactive mode – In interactive mode, you can run python command and you can use python as a calculator. You can execute one command at a time only, after every execution it produces the result.

Script mode – Here you can write multiple lines of code as a file with a .py extension and execute the file as a python program. We will discuss the python scripting mode in the next chapter.

Python as a Calculator

We can use Python as a calculator. to use python as a calculator we will use the interactive mode of python.

For Interactive mode, you need to open Python IDLE from start menu in Window: Start -> Program -> Search IDLE

Mac or Ubuntu: Type IDLE3 in your terminal window.

The above command will open the Python shell, you can write any complex calculation.

Python 3.4.3 (default, Nov 12 2018, 22:20:49) 
[GCC 4.8.4] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 

You can see the symbol (>>>), where you can write calculation, python will print result.

Some More Examples

>>> 12+12
24
>>> 12+12*12
156
>>> (12+12)*12
288

Arithmetic Operators

>>> 10+3	# Print Addition
13
>>> 10-3	# Print Subtraction
7
>>> 10*3	# Print Multiplication
30
>>> 10/3	# Floating Divison
3.3333333333333335
>>> 10//3	# Integer Divison
3
>>> 10%3	# Modulus, Return Remainder
1
>>> 10**3	# Exponent, Cube of 10
1000

236

Created on May 23, 2020 By S. Shekhar

Python - Quiz 2

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IDLE stands for

Integrated development and learning

Integrated development and learning environment

Integrated development and learning extension

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