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So operators in Swift and in programming in general, well, the first operator we're going to discuss



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is the assignment one this you've seen before, because if I type this statement, the equals symbol.



3

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Is the assignment operator, I am assigning something to a variable in memory space.



4

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Of course it's the same, even if I have a tuple.



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I am assigning two things to that people, so X is nine and Y is zero.



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In this case, a single equals sign is an assignment.



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OK, the next lot of operators, we have our arithmetic now.



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This is the category that everyone thinks of when you say the word operator.



9

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So in that case, we'll have something like X plus Y, X minus Y.



10

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You can see where this is going, X times Y.



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Notice that that is an asterisk symbol.



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It's not a multiplication symbol because X or Times is actually a letter.



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So it's reserved for that use.



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And then of course we have X divided by Y, which is a forward slash.



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So all of these middle sections are the arithmetic opera operators.



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We also have stuff such as nine percent four, which is the modulo I think is the word for it, and



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this gives us the remainder.



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So nine divided by for the remainder of that should be one.



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Now, nothing's working, right, if you encounter this in your playground, you will look look at that



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horrible error.



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Then what you have to do is probably quit your playground.



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And then restart everything.



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Oh, there we go.



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I think that's.



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Oh, that's weird, I'm going to restart.



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See you in a sec.



27

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So I restarted and I saw what the error was.



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X divided by Y is nine, divided by zero, which is infinity.



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So what I'm going to do is just do the following.



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Put a one there.



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Now, we should be all right.



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There we go.



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It's what we call in programming a picnic problem in chair, not in computer.



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OK, so now back to the modulo operator and this gives us a remainder of one because nine divided by



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four is to remainder one.



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OK, and that is actually very handy.



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You'll see what that's like.



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You'll use that quite a lot in your programming life.



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In fact, in this course, we've already used it a fair amount.



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Now, the other thing we have is let's say we have two words and we want to smash them together.



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This is called the concatenation operator or concat for short.



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This is common to pretty much every language out there.



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There are shortcuts to miss out this concat operator and swift, which are slightly easier to type.



44

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But I tend to use these anyway because I'm old school like that.



45

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So that's the concatenation operator.



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Now your homework.



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Let's get this out here.



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Create any two numbers, multiplied them and give the result as a sentence with words.



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So I want you to use pretty much all these operators here and then the concatenation operator to do



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that.



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Good luck.