How to Append to a List in Python?

Appending to a list in Python means adding an item to the end of an existing list. Python lists are dynamic, meaning you can add or remove items as needed.

1. Explanation:

To append an item to a list, you use the append() method. This method adds a single element to the end of the list.

Step-by-Step Guide:

2. Create a List

First, you need a list to work with. You can create a list with some initial items or an empty list.

my_list = [1, 2, 3]  # This is a list with three items

3. Append an Item 

Use the append() method to add an item to the end of the list.

my_list.append(4)  # This will add the number 4 to the end of the list

4. Check the List 

Now, if you print the list, you will see the new item added at the end.

print(my_list)  # Output will be [1, 2, 3, 4]

5. Example

Here's a complete example from start to finish:

# Step 1: Create a list
my_list = [1, 2, 3]

# Step 2: Append an item to the list
my_list.append(4)

# Step 3: Print the updated list
print(my_list)  # Output: [1, 2, 3, 4]

Conclusion

Appending to a list in Python is simple and useful for dynamically adding elements. Using the append() method, you can easily add items to the end of your list, allowing your list to grow as needed. This is particularly helpful when you don't know in advance how many items you'll need to store.