Skip to main content

-List in Python-

 List:

 A list is a collection of ordered and changeable objects variable. It stores more than one value in a single variable.

ex: fruits=[“apple”,”banana”,”mango”] ->list of strings

 odd_numbers=[1,3,5,7] ->list of numbers 

Why is it called collection?

 Stores more than one and  different values in a single variable 

Why ordered? 

Each element of the list is assigned an index number and can be iterated sequentially using this index.



ex: print(fruits[0]) will print “apple” print(fruits[-3]) will also print “apple” 

Why changeable?

 An element at an index can be changed/deleted. 

fruits[0]=” orange” will replace apple with orange in the list. d

el fruits[1] will delete bananas from the list 

Note: List values need not be of the same datatype [“apple”, i 2] is also a list

 Note: Operations on the list are almost similar to that of strings. 




code for above mentioned operations. 

above-mentioned

So now, we are ready to write some to fun codes with lists. we'll create a bowl of fruit_salad.

Create an empty list of fruit_salad, a list of fruits, and a list of additives. 





Print the fruits and additives available . 




































Add the fruits to the fruit salad.

Now ask your family members, for an additive of their choice, and add it to the fruit salad.








Comments

Popular posts from this blog

- Object Oriented Programming -

In OOP, we can represent an entity using a class.  A class bundles data (features/properties of entity - color, height, width) and functionality (movement, expression) together.  An instance of a class is known as an object.  Which is the only cartoon series that had predicted that Trump would be elected as the president of the USA and also predicted the coronavirus spread?   Answer: Simpsons.  Simpsons is a very popular animated show. You can build something similar with python.  But have you ever wondered, how Simpsons look the same in all the series? Only his movement looking and, expression change but his main features like color, height, and face look exactly the same all the time.  This is because we create a ‘blueprint’ of Simpsons and whenever we have to simulate him on screen we use this blueprint. This keeps a record of all the features of Simpsons and recreates it whenever we want.  This is where Object-Oriented Programming(OOP) h...

– Sequences, Algorithms and Programs in Python ---

 Before moving forward, Let's learn how to install Python software in your System which is very important for the further understanding of these topics. Imagine, you are a regular customer of Uncle Sam’s Pizza restaurant, can you help Uncle Sam prepare the menu and take a printout of it? Which application will you use for that? You will type the menu using MS word and then take a printout of it. right?  So, you know that we can use MS Word to create documents. Similarly, if you want to write a python program, you need an IDE (Integrated development environment). This IDE helps you to write a python program and then run it so that you can see the result/output of the program.  Steps to install python/IDE in your local system. (Windows /MAC )   Note : Prerequisite for installing python in Windows- Windows 8 or above. go to this website .   1. Click on download python as per your OS. Mac users may download the Mac version. Windows users download depending on 32-bit...

-List Slicing in Python-

 List Slicing : Slicing helps in creating a new list from an existing list.  Syntax list_name [start :end:step] Suppose you have a list of Avengers, arranged in the order of your preference.   avengers=[“Iron Man”,”Thor”,”Hulk”,”Spider Man”,”Captain America”,”Black Panther”,”Hawk Eye”,”Vision”,”Black Widow”] Later you decide to split them into a separate list like  favourite=[“Iron Man”,”Thor”,”Hulk”]                                                   less_favourite =[”Spider Man”,”Captain America”,”Black Panther”]                             least_favourite=[”Hawk Eye”,”Vision”,”Black Widow”]  Now, we have 3 lists formed from the main list. Would you want to create these lists again from the beginning? This is where list slicing helps us. Here is the code to  G...