A finished BU 451 Unit 4 control flow and functions submission: repeated blocks replaced by named functions with declared inputs, and each one checked against a known answer. Searches like "bu 451 unit 4 assignment example", "bu451 unit 4 sample" and "bu 451 unit 4 example" land here.
What a finished BU 451 Unit 4 control flow and functions looks like
Two versions of the same work usually sit in the submission, and the comparison is half the point. The first is the original sequence with the repetition visible, marked to show which parts differ and which are identical. The second is the rewritten file: a set of functions near the top, each one named as a verb phrase saying what it produces, each taking everything it needs as an argument and returning a single thing rather than printing. Below them a short main section calls the functions in order, and reads as a summary rather than as the analysis itself. Conditional branches carry a comment naming the case each one handles, including whatever happens when none of them apply. A small block at the end runs each function against inputs whose correct output was worked out by hand.
How a BU 451 Unit 4 example is structured
The original is kept beside the rewrite because a refactoring nobody can compare to anything is just a file, and the criterion is asking what changed and why. Functions take their inputs as arguments rather than reaching outward for values, since a function that depends on something defined elsewhere in the file will work in place and fail anywhere else. Returning instead of printing is what makes a function usable twice, and it is the distinction most drafts miss. The main section is kept thin so that reading it tells a marker the shape of the analysis without opening anything. Branch comments name the case rather than restating the condition, and the case nobody expected is handled explicitly because that is where an unattended script goes wrong. The checks come last and use inputs small enough that the right answer can be stated in the comment.
The original kept beside the rewrite
Both versions appear so the change can be judged, since a refactored file with nothing to compare against demonstrates nothing at all.
Inputs declared, nothing reached from outside
Each function receives what it needs as an argument, because one that depends on a value defined elsewhere works only where it was written.
Functions return rather than print
A returned value can be used again, tested and passed onward, which is the difference between a function and a block with a name.
Branches labeled by the case handled
Comments name the situation each condition covers, including the one nobody expected, since that is where a script left running quietly goes wrong.
Each function checked against a known answer
Small inputs with an answer worked out beforehand are run through every function, so correctness is demonstrated rather than assumed.
Where marks go in BU 451 Unit 4
Refactoring loses credit when the copies are still copies. Three blocks with one word changed, moved into three functions, have renamed the repetition instead of removing it. Functions reading values that were never passed in run correctly in the file they were written in and fail the moment a marker calls one on its own. Printing inside a function instead of returning makes the result unusable anywhere else and is the commonest defect here. Names like temp, data2 and final tell a reader nothing and are penalized under readability wherever the rubric mentions it. Conditions with no branch for the unexpected case fail without a message. Loops built around work that a single operation already handles add length and risk. Submissions with no check at all leave correctness asserted.
Get a BU 451 Unit 4 example written to your instructions
Give us the unit instructions, the BU 451 rubric from your classroom and the script you are being asked to rework. The custom example keeps both versions side by side, declares every input, returns instead of printing, labels each branch by the case it covers and closes with checks against known answers. First custom sample free, back in 24 to 48 hours.
BU 451 Unit 4 questions, answered
How many functions is the right number?
Enough that each one does a single describable thing, and no more than that. If naming a function requires the word and, it is probably two. A submission with four well separated functions and a readable main section usually scores better than one with a dozen, because a marker has to hold the whole file in mind while reading it.
Do the checks at the end count as testing?
They are enough for an undergraduate submission and they are what most rubrics here are looking for. A few calls with inputs you can reason about, each with the expected result stated in a comment, show that the function was verified rather than hoped over. If your section names a testing framework, use it; where nothing is named, the plain calls read perfectly well.
I have written functions at work. Can I reuse them here?
Code written on the clock generally belongs to the employer who paid for it, and that is a question for your contract rather than for us. Even where the logic is ordinary, a function carrying internal column names, business rules or system quirks describes the company in a document that goes to a school. Write the submission against the case the assignment gives you.