What will be the output of the following Python code?datavalues = [1, 2, 3, 4] datavalues.append([5,6,7,8]) print(len(datavalues))Options48125
Question
What will be the output of the following Python code?
datavalues = [1, 2, 3, 4]
datavalues.append([5, 6, 7, 8])
print(len(datavalues))
Options:
- 4
- 8
- 12
- 5
Solution
Break Down the Problem
- Identify the list
datavalues
and its initial content. - Analyze the effect of the
append
method on the list. - Determine the final length of the list after the operation.
Relevant Concepts
- The
append
method in Python adds an item to the end of a list. - The
len
function returns the number of items in a list.
Analysis and Detail
-
Initial List:
datavalues = [1, 2, 3, 4]
(length is 4).
-
Using
append
:- The code
datavalues.append([5,6,7,8])
adds the entire list[5, 6, 7, 8]
as a single new element todatavalues
. - After this operation,
datavalues
looks like this:[1, 2, 3, 4, [5, 6, 7, 8]]
. - Note that the list
[5, 6, 7, 8]
is treated as one item.
- The code
-
Calculating Length:
- The new length of
datavalues
is now 5 (the original four numbers plus one list).
- The new length of
Verify and Summarize
- The final list contains five elements: four integers and one list.
- The
len(datavalues)
returns 5.
Final Answer
The output of the code will be 5
.
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