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Hey there.

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In this lecture I want to go over the comparison operators in Lua.

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You already know three comparison operators greater than, less than and equal to.

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But there are three other comparison operators I would like to demonstrate.

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So I'm going to open up this little section here in my script.

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And here are the six comparison operators we get to use in Lua.

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You already know of the less than, greater than and equal to comparison operators, but we have a few

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others, such as less than or equal to, greater than or equal to and not equal to, and we use a tilde

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key to represent not equal.

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So to demonstrate this all I'm going to do is create a variable.

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I'm just going to call it comparison num.

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And we're going to set it equal to a value of like ten.

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Then we can create an if statement.

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So we'll type out if and then create our condition here.

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So we're going to check if our comparison number is let's say less than 50.

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So if our comparison number is less than 50 then we can print out into the console.

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The condition was truthy.

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And obviously since ten is less than 50 we should get that string printed into the console.

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So we hit run.

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There we go.

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The condition was truthy.

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However, once comparison number becomes greater than 50 and we hit run.

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As you can see, nothing gets printed out into the console because that condition evaluated to false.

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However, let's say the comparison number was exactly the value of 50.

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Well, 50 is not less than 50, so this condition would still evaluate to false.

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But what if we wanted to include the value of 50?

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Well this is where we can use the less than or equal to comparison operator.

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So what I'm going to do is put an equal sign here and there we go.

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Now it's checking if the comparison number is less than or equal to the value of 50.

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And since 50 is equal to 50 this should be true.

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We hit run and there we go.

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The condition was truthy.

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We can also check if comparison number is greater than or equal to 50.

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So if we made this value such as 51 and we hit run, of course the condition was truthy because 51 is

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greater than 50 and if we left it at 50 it would also evaluate to true because 50 is equal to 50.

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Now what if we want to check when a value is not equal to another specific value?

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For example, maybe we only want to execute this if statement when comparison number is not equal to

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ten.

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So if I put this tilde key here, we're now checking if comparison number is not equal to.

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And then we can put the value of ten here.

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So this will only execute when comparison number is not equal to ten.

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Any time the comparison number is ten this is not going to execute.

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So if I put the value of ten here and we go and run.

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As you can see, nothing gets printed in the console because ten is equal to ten.

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So this evaluated to false.

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But if we made comparison number for example like negative ten and we hit run.

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As you can see, the condition was truthy because negative ten is not equal to ten.

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We can also make this a big number like like that.

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And then we hit run.

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And of course the condition was truthy because that big number is not equal to ten.

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So this was just a brief overview of the comparison operators you will be using in the conditions for

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your if statements.

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I will see you in the next one.