How do I concatenate two lists in Python?

In this Python example we will discuss some to concatenate two lists in Python.

Some of the topics which will be helpful for understanding the program implementation better are:

• List in Python
• Function in Python
• Dictionary in Python
• For loop in Python

1. Using the + operator

One way to concatenate two lists in Python is to use the + operator. This operator combines the two lists into a new list that contains all the elements from both lists.

Here’s the code:

cars1 = ['Toyota', 'Honda', 'Nissan']
cars2 = ['BMW', 'Mercedes', 'Audi']

all_cars = cars1 + cars2
print(all_cars)

Output
['Toyota', 'Honda', 'Nissan', 'BMW', 'Mercedes', 'Audi']

2. Using the extend() method

extend() method adds all the elements from one list to another list. It modifies the original list and does not create a new list.

Here’s the code

cars1 = ['Toyota', 'Honda', 'Nissan']
cars2 = ['BMW', 'Mercedes', 'Audi']

cars1.extend(cars2)
print(cars1)

Output
['Toyota', 'Honda', 'Nissan', 'BMW', 'Mercedes', 'Audi']

3. Using the * operator

The * operator creates a new list that contains multiple copies of the original list.

Here’s the code

cars1 = ['Toyota', 'Honda', 'Nissan']
cars2 = ['BMW', 'Mercedes', 'Audi']

all_cars = cars1 * 2 + cars2 * 3
print(all_cars)

Output
['Toyota', 'Honda', 'Nissan', 'Toyota', 'Honda', 'Nissan', 'BMW', 'Mercedes', 'Audi', 'BMW', 'Mercedes', 'Audi', 'BMW', 'Mercedes', 'Audi']

4. Conclusion

In this Python example, we discussed how to concatenate two lists using the + operator, the extend() method, or the * operator.

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