perl function use

In Perl, use is a built-in function that allows you to load and import modules into your program. The syntax for using use is as follows:

use Module::Name;

Here, Module::Name is the name of the module that you want to load. Once the module is loaded, you can use its functions and variables in your program.

Here's an example:

use strict;
use warnings;

use Math::Trig;

my $radians = deg2rad(45);
my $sin = sin($radians);

print "sin(45) = $sin\n";

In this example, we first use the strict and warnings modules to enforce good programming practices and detect potential errors. Then, we use the Math::Trig module to convert degrees to radians and calculate the sine of an angle. Finally, we print the result to the console.