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In this video, we are going to learn how to run Node.js functions.

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So in the previous video we are running the console.log operation and we can run the node command with

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passing this index file.

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So in this video, we are going to create methods and see how these methods in our Node.js applications.

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In order to do that, let me create a function in here.

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It will be the local function.

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And we don't have any parameter and we are using the anonymous function structure.

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So basically I'm going to console.log inside of this logger method.

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So now as you can see that we have two times log operation.

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This is the first line of our indexes and we have a method and inside of the method we have another

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log operation.

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So that means we have added the other logger function.

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Now we can run the node command again.

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So in order to do that, please open a terminal, go to section 18, go to lecture folder.

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And now I'm going to run, not index.

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So that means we are in this folder and we are running node index command to run this index file which

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just hit enter.

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And as you can see, that response only comes with the first line of code.

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So that means the only one time our log operation works.

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Why logger function not execute and not write this log?

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Because we didn't call it.

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So in order to call this function, we need to come here and we basically write the method information

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with passing the parameters.

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In our case, we don't have any parameter, but we should provide these brackets.

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So with this line of code, we basically invoke this method to run the additional look.

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So after save this index file, we can run, not index again.

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And if you hit enter.

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This time you can see that we can execute logger function with invoking into index this file and we

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also see the second look which comes from the local function because this time we have invoked the local

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function in our index file because note command only runs if there is a calling code into JS file.

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So let's develop a little bit more.

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So I'm going to write some additional code, which is the anonymous function.

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Let me copy paste and I will explain after that.

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So instead of creating any method and calling this method, we can directly write method and invoke

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method instantly with this format, which is the anonymous function.

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So we can use anonymous function in order to imitate execute our index file.

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So if we run not index again, we can see that we have three times log operation and these enormous

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function instantly execute inside of the log operation or method body.

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So as you can see that we have successfully run Node.js function and understand the node commands.