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Welcome back.

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And this video, we're going to look at another type of operators, the comparison operators, so comparison

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operators are the ones that you can see here.

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So double equal, not equal less than greater than less than equal or greater equal.

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So now let's see how they are used in Scotland.

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First of all, let's create this variable called is equal, and it's going to be the result of the following

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operation, which means five, equal equal three.

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So what does that do?

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Well, it checks if the value on the left hand side is the same as the value on the right hand side.

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So that's what this double equal sign does.

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So it's comparing two values to each other, and it's going to give us a Boolean result.

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So it says it's a Boolean expression, even though we can simplify the Boolean expression.

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So let's just do that.

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You can say it gives me the result directly, which is false.

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But of course, that's not what I wanted because what I wanted is to display this operation here, which

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is just saying, OK, one side equal, equal the other side, or is the one side the same value as the

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other side of this equation here?

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So if you do that, you will get a result, which is either false or true.

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So if we do the same with five equals equals five, then of course the result will be true.

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And in this case, it's super obvious because we can see those values.

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But let's say they are hidden behind a variable where you can't always see the variable value, then

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this will be a very useful operation because maybe you even want to do something based on that operation.

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So let's say if this condition is true, then you want to run some code, then it's going to be very

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important to do this type of comparison operations.

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And of course, this is also something that we are going to look at later on, which are if statements.

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But for now, this is our very simple operation that we have here.

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So now let's go ahead and print something onto our console and I'm going to write is equal is plus is

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equal.

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So what I'm doing here is using concatenation.

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So it's just.

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Using this drink and then it's converting this into his drink and just saying whatever the value is.

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So if we run that we can see that is equal is false.

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So our is equal is false.

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So then of course, our I.D., which means our Android Studio says, hey, you can convert concatenation

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to a template.

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So let's do that.

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And you can see what it does.

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It changes this to having a very different way of writing it.

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So one was the concatenation, and this one is a template that we're using here, which requires this

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dollar sign.

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So what we can do is we can use this dollar sign and afterwards, whatever the value or the variable

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that we want to use is will be printed here.

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So in this case, it's just going to be the result of whatever we had here.

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So if we run, this will result in the same.

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Type of print statement that we have here, and so I need to run it twice and we are is equal is false.

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So now let's use this a little more because let's create a another comparison where I'm just going to

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create is not equal is going to be five, not equal five.

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So let's just test if that is true or false.

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Of course, it's going to be false because five is equal.

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Five.

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But if we just print that now and let me put it this again, but now with is not equal.

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All right.

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So now I'm using is not equal instead of is equal.

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And to comment this line out and I'm going to change the name here as well.

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So it's going to be is not equal is.

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And then let's see if it's true or false and we can see it says is not equal.

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It is false because five is equal five.

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But we are checking if five is not equal.

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Five.

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So this exclamation mark here says that it should be not equal.

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So this year is another way of testing a comparison.

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But of course, there are a bunch more that we have here.

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So what we can check is, let's say, the following.

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So instead of creating a new variable for every single one of those comparison operators, let's just

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do it in the print line statement directly.

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So.

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Is greater, so in this case is five greater.

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Three is going to be.

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And now I'm using something very cool here because I'm using another pretty cool feature here of Scotland

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where we have the same principle that we had here.

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But now, because we don't just have one variable that we want to put into a string, but we want to

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put a calculation, so to speak, or in this case, a comparison.

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So the whole expression, so to say.

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And then we need to use these curly brackets.

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So we're saying, please run the code within the curly brackets and then print the result in this stead.

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So at this spot of our code?

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So now if we run this.

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We can see that it says is five greater, three is true.

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Well, of course it's true because five is a greater number than three years.

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But now let's say we check the same thing with a minus five.

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If that is greater than three, then it should be false.

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And then we are.

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It's as false.

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Of course, I didn't add the minus here in the print statement.

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All right, but get the gist of it.

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Now, of course, we can do the same with some other print statements here.

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So print alone is five lower equal three, and then please try to do the expression in here.

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So try it yourself before I will show you how to.

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All right.

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So the expression starts with a curly bracket, and then we say five less bun equals three.

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All right, so this is the expression.

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Now let's see what we get as a result here, and we can see his five lower equal three.

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It says false because five is a greater number two and three.

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So the whole expression.

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Ends up being false.

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And that's what we get as the print statement here.

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So this concept that we use here is called string interpolation.

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All right.

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So just so you have seen this keyword.

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Of course, you can now go ahead and do the same with the other comparison operators that we've seen

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there at the top.

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So instead, we could use greater equal and here is higher or greater equal.

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Three.

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And then.

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We saw the other one, right?

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I actually.

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Is.

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Less.

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Three.

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And let's run this.

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So now we have all of our results here.

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Is not equal, this falls here is five minus five less than three, it's true, yeah, of course, because

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a negative value is going to be less than a positive value than we have is lower or five lower.

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Equal three is false and is five greater equal.

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Three is true.

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Of course, we can also set a five in there just to see if this is still going to work.

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And once we run it, we can see is five greater equal, five is also true because five is equal five.

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That's why this equation is correct.

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So there's greater equal is accepting both.

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So it's going to return true if the left value is greater than the right value or if they are equal.

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All right.

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So that's it for assignment operators.

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And the next video, we are going to check out increment and decrement operators.

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So see you there.