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In general, functions do the following for code and software developers. Note: there are multiple correct answers. Make code more reusable and modular Abstract and hide complexity Make your code longer Make code difficult to understand Are not needed and confuse developers

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Answer:

- Make code more reusable and modular

- Abstract and hide complexity

Step-by-step explanation:

A function is a block of code that defines some process that will get repeated whenever that function is called.

For example (the following is purely pseudo-code and is not written in any specific language):

square(x):

return x * x

The function square(x) takes an input x and returns that number squared.

Now this function can be called in another block of code or even within another function.

For example:

sum_of_squares(x, y):

return square(x) + square(y)

As you can see, calling the function square(x), within the function sum_of_squares(x, y), helped make the code shorter.

This achieved two things:

  • Make the code reusable and modular: we were able to reuse the the function square(x) instead of writing it twice
  • Abstract and hide complexity: By calling the function, we are able to use it without knowing how it works. This hides complexity and makes code easier to use. For instance, consider a function that calculates the cross-product (don't worry about what this is if you don't know yet, just keep in mind that it is a complicated mathematical process) of two vectors v and u, instead of manually coding the complicated process every time we need to calculate the cross-product, we can just define and call the function cross_product(v, u), this just made the code a lot easier to understand

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