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All right, what is going on, guys, and this is a very interesting and very straightforward exercise
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that will utilize the usage of recursion concept.
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So what do we have to do here?
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So let's start.
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We have to write a function to we have to write a function that will do the following things.
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First of all, this recursive function should get some integer value, let's say none.
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OK, so the function is going to receive that will receive an integer value.
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None.
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OK, that's the first thing that our recursive function have to do.
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Recursive, right.
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We are talking about the recursion concept and we are going to use a recursive function.
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So this function is going to receive NUM and the way the function is going to work is basically to receive
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from the user a series of numbers of, let's say, natural numbers until the user will specify minus
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one, for example, for the stopping condition.
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So the function is going to read, let's say, a serious sequence of numbers from the user up until
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up until up until receiving minus one.
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And the function is going to return all of the numbers, basically not all the numbers.
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The total amount of numbers which are smaller than OK, so return, the total number is smaller, smaller
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than the value.
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All right.
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So let me discuss it.
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Let me tell you a little example.
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I think an example will be a good thing here.
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So, for example, if you receive OK, if you receive now equals to five.
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Oh, right.
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And you have a sequence of numbers from the user alike, I don't know, six, eight, 10.
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And then you have like three, one and seven and finally minus one.
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Then in this case your recursive function should just return to OK, so the function should return to
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why the function should return.
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Return to is because on every time that you have read some value from the user.
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OK, so you read the six, you read the eight, read 10, three one and so on and so forth, so on.
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Every duration that you've read, not the duration actually, but on a recursive call, you checked
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if a given number that you were reading is less than five, and if that's the case, you would simply
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take these into account.
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And finally return of the total numbers smaller than the naoum value than in this case, simply three
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and five are smaller than some, not including the stopping condition, which is minus one.
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And then basically you should return the value of two.
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So I hope the instructions are clear to you.
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And this exercise is not so trivial because I mean, there are a couple of things that we need to take
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into consideration.
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And one of these things is basically the fact that we don't really know in advance how many values the
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user will insert.
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Right.
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We don't know if it will be one, two, three, five and so on and so forth.
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OK, and the second thing that we have to take into consideration is the fact that we cannot use here
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some standard while loop and to like read the values from the user, because that's the Terentiev approach
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to solve this exercise.
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But we want the recursive approach using recursive functions.
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OK, so these are the two things that you have to bear in mind.
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And also once we are going to start solving this exercise, what you also have to bear in mind is the
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fact that you have to think of a way to construct these recursive function.
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So you guys take your time.
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Please take at least five, 10, even half an hour to think of this solution.
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Try to write down everything on your on your own and to understand how you would have been you would
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have implemented this on this function.
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And until you do, I will be waiting for you and I will see you in the next video where we are going
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to solve this exercise together.
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So until then, good luck.
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