How do you access the last element of a list in Python?Question 11Answerlist[-1]list[last]list[0]list[size-1]

Break Down the Problem

1. We need to determine how to access the last element of a list in Python.
2. The options provided are:
   • list[-1]
   • list[last]
   • list[0]
   • list[size-1]

Relevant Concepts

1. Lists in Python are indexed starting from 0. Therefore, the first element is at index 0, the second at index 1, and so forth.
2. Negative indexing allows access to elements from the end of the list, where -1 refers to the last element.
3. The syntax list[n] retrieves the element at index n.

Analysis and Detail

1. Option 1: list[-1]

   • This accesses the last element of the list due to negative indexing.

2. Option 2: list[last]

   • This is incorrect, as last is not a defined index; it should be a numeric value.

3. Option 3: list[0]

   • This accesses the first element of the list, not the last.

4. Option 4: list[size-1]

   • This could access the last element if size is the total length of the list, given by len(list). However, this is not the most straightforward way to access the last element.

Verify and Summarize

• The most concise and efficient way to access the last element of a list in Python is using list[-1].
• The notation list[size-1] is valid too, but it requires calculating the length of the list first, which is less efficient.

Final Answer

The correct option to access the last element of a list in Python is: list[-1].