perl function qx

The qx function in Perl is used to execute a command as if it were a shell command and returns the output of that command. It is also known as backticks operator or command substitution.

Here's an example:

my $output = qx(ls -l);
print "The output of ls -l command is:\n $output";

In this example, qx(ls -l) executes the ls -l command as if it were a shell command and stores the output in $output variable. Then, the print statement is used to display the output of the command on the screen.