Learn Python – How to append element in the list- Basic and advance

Python presents built-in methods to append or add factors to the list. We can additionally append a list into any other list. These methods are given below.

append(elmt) – It appends the value at the end of the list.

insert(index, elmt) – It inserts the value at the specified index position.

extends(iterable) – It extends the list by adding the iterable object.

Let’s apprehend these strategies through the following example.

  1. append(elmt)

This feature is used to add the issue at the quit of the list. The example is given below.

Example –

names = ["Joseph", "Peter", "Cook", "Tim"]  
  
print('Current names List is:', names)  
  
new_name = input("Please enter a name:\n")  
names.append(new_name)  # Using the append() function  
  
print('Updated name List is:', names)  

Output:

Current names List is: ['Joseph', 'Peter', 'Cook', 'Tim']
Please enter a name:
Devansh
Updated name List is: ['Joseph', 'Peter', 'Cook', 'Tim', 'Devansh']

2. insert(index, elmt)

The insert() characteristic provides the elements at the given an index position. It is advisable when we choose to insert factor at a precise position. The example is given below.

Example –

list1 = [10, 20, 30, 40, 50]  
  
print('Current Numbers List: ', list1)  
  
el = list1.insert(3, 77)  
print("The new list is: ",list1)  
  
n = int(input("enter a number to add to list:\n"))  
  
index = int(input('enter the index to add the number:\n'))  
  
list1.insert(index, n)  
  
print('Updated Numbers List:', list1)  

Output:

Current Numbers List:  [10, 20, 30, 40, 50]
The new list is:  [10, 20, 30, 77, 40, 50]
enter a number to add to list:
 45
enter the index to add the number:
1
Updated Numbers List: [10, 45, 20, 30, 77, 40, 50]

3. extend(iterable)

The extends() characteristic is used to add the iterable factors to the list. It accepts iterable object as an argument. Below is the example of adding iterable element.

Example –

list1 = [10,20,30]  
list1.extend(["52.10", "43.12" ])  # extending list elements  
print(list1)  
list1.extend((40, 30))  # extending tuple elements  
print(list1)  
list1.extend("Apple")  # extending string elements  
print(list1)  

Output:

[10, 20, 30, '52.10', '43.12']
[10, 20, 30, '52.10', '43.12', 40, 30]
[10, 20, 30, '52.10', '43.12', 40, 30, 'A', 'p', 'p', 'l', 'e']