How to add elements in list in Python

In this article, we will some methods through which we can add elements in list.

append()

This list method add a single element in the end of the list. It can be number, string or another list.

Length of the list is incremented after each append.

Syntax: list_name.append(object)

object – can be number, string or another list

li = [1, 2, 3, 4]

li.append(5)
print(li)

li.append('six')
print(li)

li.append([1, 2])
print(li)

Output:

[1, 2, 3, 4, 5]
[1, 2, 3, 4, 5, 'six']
[1, 2, 3, 4, 5, 'six', [1, 2]]

extend()

This method adds all the elements of an iterable(list, tuple, string etc.) to the end of the list

Syntax: list_name.extend(iterable)

li = [1, 2, 3]
#adding list
li2 = [4, 5]
li.extend(li2)
print(li)
#adding tuple
t = (6, 7)
li.extend(t)
print(li)
#adding set
s = {8, 9}
li.extend(s)
print(li)

Output:

[1, 2, 3, 4, 5]
[1, 2, 3, 4, 5, 6, 7]
[1, 2, 3, 4, 5, 6, 7, 8, 9]