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So how did you find that homework?



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Well, I mean, I gave you the function answer, really, you didn't have to think much about that,



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but.



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Her function homework, I don't think it's that necessary to to come up with these because you type



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it all the time when you're coding, you'll soon get into the swing of things.



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The tricky bit was to actually get those three numbers and multiply an array and I'm going to show you



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a basic way of doing it.



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We're going to have a VA return and this is going to contain the array of numbers that we're going to



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return.



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Which is an array of type int.



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And this at first is going to have no elements in it's just empty.



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They were going to say for a in the array that we're passing in.



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We're going to have return dot append.



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A times three.



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So that loop is going to go round and round, get each value, multiply it by three and shove it into



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the new array, and then finally we're going to return the return array.



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And that is literally it.



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So now we can call multiply.



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The array.



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Which will be, I don't know, let's try three, four or five.



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When we play that, we should get 15, 20, 25.



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But I mean, nine, 12, 15, because times three, not five, OK, so there we have it on the right



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hand side.



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Now, again, I want you to notice this word multiply.



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It's obvious what we're doing.



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If I give you an array of integers and I say, multiply this, everyone knows what that means.



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You don't need to write things like multiply this array of ints.



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Now, why don't I need to know that?



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Well.



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This array of integers is information that's actually communicated here, and I'll prove that to you.



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Because if we're typing, multiply.



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Look what comes up at the bottom of this pop up panel, we have multiply array array, which returns



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an array.



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So every time we are typing something in Swift, we get the signature that tells us what that item is



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doing and what it's doing it on and what it's going to give you back, if anything.



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So multiply is a perfectly valid word.



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Don't overdo the naming, but also don't underdo it.



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Do it just right.