Perl Language: How To Use Function in Perl Program

Learn How To Use subroutines or functions in Perl language.

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I recommend checking out Learning Perl book. You can get a lot of answers to your questions. Plus the new edition of the book can cover some of the latest topics too.

What are Functions in Perl?

What are functions? Almost every programming language has the subroutine and function. You make use of the function and the subroutine when you want to run specific set of tasks over and over. So here's simple syntax with which you can create the function subroutine in perl.

sub subroutine_name
{
    # body of method or subroutine
}

Here is the simple implementation of the function that you can do with the perl program. Here's the example on how to get something to print without having to return any integer or any specific number.

sub demo{

print`"Hello World!\n";

}

When you want to increase the readability of the code, then you may want to make use of the function. Finding error and the code is lot more easier. You can also make use of the return value or even pass the value to the function. That also works as well. Hopefully the video helps as well.

I hope that this tutorial article helped.

If you haven't checked out the first video in the series. Check how to run program in Perl .

Also do check out the second video on the Variables in Perl language.

Tips for Running Perl Code

You can check the installation of the perl by typing the following code if you are on unix or linux, in case of windows you have to check the path if perl bin folder is added there.

which perl

Perl code requires you to have the code stored in the .perl file extension file. This way when you run the perl code say it's in the file named helloworld . pl

You can run the perl file on command prompt like this.

perl helloworld . pl

That's it. You can now execute the perl code on your computer.

If you are interested in modern language, try Go Language Tutorials.

I hope the information here helps you. I'd appreciate if you like the video and share it with others.