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Now we will talk about that functions.

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OK, now this is a simple example, as you can see, which is the Halo function.

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As you can see, it defined your function here.

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So hello.

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And open the brackets, open the process and echo the word now to invoke your function.

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You can just call its name, which is hello, like this and it will print Hello World.

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Now let's see what will happen now.

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So again.

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Yeah, hello.

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It worked 100 percent, but actually this is a simple lecture and a quick lecture.

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But we talked about how the function work, OK, and it is exactly the same as the basic of programming.

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OK, when you invoke the hallow function without putting the brackets destiny.

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All right.

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Thanks for watching.