How To Install perl-constant on CentOS 7
Introduction
In this tutorial we learn how to install perl-constant on CentOS 7.
What is perl-constant
This pragma allows you to declare constants at compile-time use constant PI => 4 * atan2(1, 1); When you declare a constant such as “PI” using the method shown above, each machine your script runs upon can have as many digits of accuracy as it can use. Also, your program will be easier to read, more likely to be maintained (and maintained correctly), and far less likely to send a space probe to the wrong planet because nobody noticed the one equation in which you wrote 3.14195. When a constant is used in an expression, Perl replaces it with its value at compile time, and may then optimize the expression further. In particular, any code in an “if (CONSTANT)” block will be optimized away if the constant is false.
We can use yum or dnf to install perl-constant on CentOS 7. In this tutorial we discuss both methods but you only need to choose one of method to install perl-constant.
Install perl-constant on CentOS 7 Using yum
Update yum database with yum using the following command.
sudo yum makecache
After updating yum database, We can install perl-constant using yum by running the following command:
sudo yum -y install perl-constant
Install perl-constant on CentOS 7 Using dnf
If you don’t have dnf installed you can install DNF on CentOS 7 first.
Update yum database with dnf using the following command.
sudo dnf makecache
After updating yum database, We can install perl-constant using dnf by running the following command:
sudo dnf -y install perl-constant
How To Uninstall perl-constant on CentOS 7
To uninstall only the perl-constant package we can use the following command:
sudo dnf remove perl-constant
References
Summary
In this tutorial we learn how to install perl-constant on CentOS 7 using yum and dnf.
