Learn Python - Day One !!!
Hello EveryOne, Today we will learn Python Programming language in a basic and easy manner. Let's make it happen.
Lets starting with definition
Python is a High level general programming language. Its syntax is as similar like English. and it's syntax is so easy to understand. here, You will be able to make a 2D game in python in just 200 lines only. In any other Programming, its impossible.
Code length Comparison
Applications of Python
Now, Lets start the Programming in Python
- First of all go to https://www.python.org and Download the latest version of python(Currently is 3.7).
- After Downloading, Install the Setup by double clicking on the python3.7.0.exe file.
- then a diaglog box appear like this (then Follow the steps as shown)
- then Launch the IDLE from the window searchbar.
Now Lets Start Our First Python Code
Lets make a program to enter any name and display it.
Now Proceed with one more example
Lets make a program to add two numbers
How to take User input in Python
Input can be taken from keyboard in python using input() function
name = input(" Enter name : ")
Output: Enter name : Brain-Mentors
IF - ELSE in Python
The if-else statement is used to conditionally execute a statement or a block of statements based on required condition. Condition can be true or false, execute one thing when the condition is true, something else when the condition is false.
Lets take an example that we have to find number is even or not
Loop means basically repeatition.
lets talk about programming view of loop, here if we want to repeat the code as required times, we can put it in a loop In Python, There are only Two types of Loops
- FOR Loop
- WHILE Loop
for loop in Python is used to iterate over a sequence (list, tuple, string) or other iterable object
lets take an example, print a star pattern using for LOOP.
Lets take an another example, print number from 1 to 10 using for-loop
The while loop is used to iterate over a block of code as long as a given condition is true. Lets Understand the While Loop by taking an example.
Print number from 1 to 5 using while Loop
LISTS in Python
list is a type of Data Structure as like Stack, which is used to store multiple data(data can be similar or dissimilar) at the same time.
Operations on List
Append items in a List
If we want to add items to a List. We can insert elements by using Append Function.
if we want to insert element at specified index, then use insert() function.
delete items List
If we want to delete itmes from existing List. We can do it by using pop() Function.
Now, Lets take an Example
Find the Reverse of an existing list
Just like lists , Tuples are sequences but are of immutable type. Immutable means it can't be changed(Updation/deletion operations can't be implemented on tuples).
A dictionary in Python is just like a English dictionary.
Python Dictionary is a set of key:pair value. Keys will be a single element, but Values can be a list or list within a list, numbers,etc
Accesing values in Dictionary
To access dictionary's elements, you can use the familiar square brackets along with the key to obtain its value.
You can Update dictionary by adding new entry or a key value pair.or can also modify the existing entry.
Delete Dictionary Elements
You can remove individual dictionary elements or clear the entire content of a dictionary. You can also delete entire dictionary in one go.