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So outputs.

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Let's talk about outputs.

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And that's actually a very popular exam question so pay attention.

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The output section is optional but we can declare optional outputs.

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And if we export these outputs we'll be able to import their values into other stacks and by stack I

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mean confirmation templates so you can start linking your cloud formation templates.

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We can also view the outputs in the areas console or using them as Seelye.

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So it allows us to quickly retrieve the value of an outputs it straight from using the the UI in terms

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of example.

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For example you can have a network cloud formation template and then you would export outputs that would

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be for example the VPC I.D. and the subnet I.D. and you would reuse those into other confirmation templates.

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And so it enables to do a cross tech collaboration where you let the experts handle their own part.

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So the VPC and the subnet and you as an app developer you just reference these values out of the box.

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Something as should know though is that if you start using the cloud formation outputs and they start

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being referenced from another cloud formation tax stack you can not delete a stack that still has outputs

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being referenced somewhere else.

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So it's just something to note.

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Now if we look at an example of the outputs in this one we are creating a SSD such security group as

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part of the templates and so we export that value as an output.

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Okay.

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And basically other templates will be able to get the value of that security group.

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So the syntax is pretty easy.

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We have the output section right here and we have the name of the security group and we have a description.

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So the SSA actually carried a group for our company.

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Here is the value so we provide a reference of the security group where that was created within the

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resources and then we have to specify this export block right here.

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Okay.

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This is an optional block.

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If you don't specify it then the value does not get exported and it will not be able to be imported.

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So when we specify the export value we can say okay this value this SSL security group I.D. is going

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to be exported as the name SSA each security group.

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So now how do we import that value.

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Well using a cross tech reference and so we'll create a second template that averages that security

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group and for this we'll use the F an import value function.

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Interesting function and we can't delete again the previous tag until all this time will be deleted.

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So if we look at this little snippet of code right here we can see that for the security groups at the

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very bottom there is a shorthand syntax for import value and then we reference the exact same name as

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before called SSA each security group.

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So just a reminder before we exported the value as SSA each security group.

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And here we import the value SSA each security group.

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So you know um outputs and exports are very very popular question at the exam especially if they start

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asking you how do you link cloud formation templates or which you the value from one to another.

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So you should know about it.

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You should know about the syntax and you should know about the import value function.

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So I hope that was helpful.

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And we'll see you in the next lecture.