Select the correct answerWhat will be the output of the following Python code?def p(q): q = q + [5] r = [1, 2, 3, 4]p(r)print(len(r))Options51An exception is thrown4
Question
Select the correct answerWhat will be the output of the following Python code?def p(q): q = q + [5] r = [1, 2, 3, 4]p(r)print(len(r))Options51An exception is thrown4
Solution
The correct answer is 4.
Here's the step by step explanation:
- The function
p(q)is defined to take a listqand append the number 5 to it. - A list
ris defined with the elements 1, 2, 3, 4. - The function
p(r)is called, but it doesn't change the original listrbecause lists are passed by value, not by reference in Python. This means that a new copy ofris created within the function, and the originalrremains unchanged. - Therefore, when
len(r)is printed, it returns the length of the original listr, which is 4.
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