Back-End Programming Exam > Back-End Programming Videos > Perl Building Blocks: An Introduction to Perl > Perl Tutorial - 48: Passing List to Subroutine
Perl Tutorial - 48: Passing List to Subroutine Video Lecture | Perl Building Blocks: An Introduction to Perl - Back-End Programming
FAQs on Perl Tutorial - 48: Passing List to Subroutine Video Lecture - Perl Building Blocks: An Introduction to Perl - Back-End Programming
| 1. What is a subroutine in Perl? |  |
Ans. A subroutine in Perl is a reusable block of code that performs a specific task. It allows you to organize your code into smaller, more manageable sections and improves code readability and reusability.
| 2. How do you pass a list to a subroutine in Perl? | |
Ans. To pass a list to a subroutine in Perl, you simply pass the list as an argument when calling the subroutine. The subroutine declaration should include a parameter to receive the list. For example, if you have a list of numbers, you can pass it to a subroutine like this: subroutine_name(@list).
| 3. Can a Perl subroutine modify the original list passed to it? | |
Ans. Yes, a Perl subroutine can modify the original list passed to it. By default, Perl passes arguments to subroutines by reference, meaning that any modifications made to the arguments within the subroutine will affect the original data. If you want to avoid modifying the original list, you can make a copy of it within the subroutine.
| 4. How can I return a list from a Perl subroutine? | |
Ans. In Perl, you can return a list from a subroutine by simply using the return statement followed by the list of values you want to return. For example, if you want to return a list of strings, you can use: return ("string1", "string2", "string3").
| 5. Can I pass an empty list to a Perl subroutine? | |
Ans. Yes, you can pass an empty list to a Perl subroutine. If you don't have any values to pass, you can simply call the subroutine without any arguments. Within the subroutine, you can handle the case of an empty list by checking the number of elements in the received list using the special variable $#. If $# is -1, it means the list is empty.
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Nov 22, 2024 Last updated |
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