What do these lines print?>>> a = [1, 2, 3, 4]>>> a.append(5)>>> len(a)256

The code you provided is written in Python. Here's a step-by-step explanation of what it does:

1. a = [1, 2, 3, 4]: This line creates a list named a that contains four elements: 1, 2, 3, and 4.

2. a.append(5): This line uses the append method to add the number 5 to the end of the list a.

3. len(a): This line uses the len function to return the number of elements in the list a.

So, after appending 5 to the list, the list a becomes [1, 2, 3, 4, 5]. Therefore, the length of the list a is 5.

The number 256 seems to be a typo or unrelated to the Python code you provided, as the length of the list a is 5, not 256.