Python List | Beginners

Python List Brief

 

1.What is Python List and How Can we Create it?

 

So python list is type of array data type we denote its via square brackets like this [ ]

Inside it any data type like int, float, str etc we can store it .

List help us to storing large no. of data via sequence wise ,Python list is the easy way to creating array in python and use it as per requirements , Python list are mutable means we can change  the data inside the list whenever we want , list is ordered  and its also allow duplicates elements.

 

 

Syntax

listname = [“Item1”, “item2”, “item3”]

print(listname)

 

 

Some built-in python method for list

 

·         Append method –

                                      With this method we can add new data or element inside list

·         Extend method –

                                With this method we can combine two list into one

·         Index method-

With this method we can check specific elements index position

 

Etc.

 

How can we use for loop with python list?

We can use python for loop with list for traversing every element separate or print full list here  we use it for print separate element in every line.

 

Syntax

listname = [“Item1”, “item2”, “item3”]

 

for i in range(0, len(listname)):

            print(listname[i])

 

or we can

 

Syntax

listname = [“Item1”, “item2”, “item3”]

n = len(listnam)

for i in range(0,n):

     print(listname[i])

here “n” is size of length of list

 

How can we extend list?

We have to make two seprate list and than we using extend method to combine list2 into list1 and than we print list2

Syntax

list1 = ["Item1", "item2", "item3"]

list2 = ["item4", "item5", "item6"]

list2.extend(list1)

 

print(list2)