Indexing in List

What is indexing in a Python list?

 Indexing in a Python list means selecting an item based on its position or index number in the list.

What is index number in a Python list?

 Each item in a list has a specific position, called an index, starting from 0 for the first item. 

For Example:

Why are we using index numbers in the list?

 We use index numbers to get any element from the list by using their index number.

 

What is the syntax to get an element from the list in Python? What is the Syntex to get element from list?

 We use index numbers to get any element from the list by using their index number.

Syntex:

list_name[index_number]

Example : How to get elements from list in Python?

Let's say I want to get an anaconda element from the given list.

lst = ["theagleye", "python", "anaconda", "spyder", "dishudii"]

print(lst[2])

Output:

 

anaconda

=== Code Execution Successful ===

More example to get an element from the given list.

lst = [12, 34, 45, 23, 45, 100, 78, 200, 12]

print(lst[7])

Output:

200

=== Code Execution Successful ===

Explanation

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What is negative indexing in Python?

Negative indexing in Python lets you access items from the end of a list. Instead of starting from 0 like normal indexing, negative indexing starts from -1 for the last item.

Example of Negative Indexing:

myLst = [100, 20, 90, 23, 45, "ehy", "eagle"]

print(myLst[-2]) #using negative indexing

print(myLst[5]) #using postive indexing

Output:

ehy
ehy

=== Code Execution Successful ===

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 How to get an index number in Python List by using the index() method?

The index() method in Python is used to find the position (index) of the first occurrence of a specific element in a list. 
It returns the index number where the item is located. If the item is not found in the list, Python will raise an error.

Syntex

list_name.index(enelemnt_to_find)

Example:

lst = [100, 20, 90, 23, 45, "ehy", "eagle"]

print(lst.index("ehy"))

Output:

5

=== Code Execution Successful ===

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