Adding a number to a list in Python can be done using the append() method or the + operator. Here are two examples:

Example 1:

numbers = [1, 2, 3, 4, 5]
numbers.append(6)
print(numbers)

Output:

[1, 2, 3, 4, 5, 6]

Example 2:

numbers = [1, 2, 3, 4, 5]
numbers = numbers + [6]
print(numbers)

Output:

[1, 2, 3, 4, 5, 6]