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How to concatenate two lists in Python

How to concatenate two lists in Python.

Here's a step-by-step tutorial on how to concatenate two lists in Python:

1: Create two lists​

First, you need to create two lists that you want to concatenate. Let's call them list1 and list2. You can assign values to these lists using square brackets [] and separating the elements with commas.

list1 = [1, 2, 3]
list2 = [4, 5, 6]

2: Using the '+' operator​

In Python, you can concatenate two lists using the + operator. Simply use the + operator between the two lists you want to concatenate.

concatenated_list = list1 + list2

3: Printing the concatenated list​

You can print the concatenated list using the print() function.

print(concatenated_list)

4: Using the extend() method​

Another way to concatenate two lists is by using the extend() method. This method adds all the elements from one list to the end of another list.

list1.extend(list2)

5: Printing the concatenated list​

Again, you can print the concatenated list using the print() function.

print(list1)

6: Using the append() method in a loop​

If you have multiple lists that you want to concatenate, you can use a loop and the append() method to achieve this. First, create an empty list called concatenated_list to store the final result. Then, iterate over each list using a loop and append its elements to the concatenated_list.

concatenated_list = []
lists = [list1, list2]  # List of lists to concatenate

for l in lists:
    concatenated_list.extend(l)

7: Printing the concatenated list​

Finally, you can print the concatenated list using the print() function.

print(concatenated_list)

That's it! You now know how to concatenate two lists in Python using different methods. Feel free to choose the method that suits your requirements best.