Similar to the rest of the Perl language, we will have similarities with bash scripting and some completely new ways of implementing conditions. This will often work in our favor; thus, making the code more readable.
First, we do not have the command line list logic, which we use in bash and we do not make use of the && and ||. Instead of these rather weird looking symbols, the conditional logic for single statements in Perl is written in the following manner:
exit(2) if scalar @ARGV < 1;
print("Hello $ARGV[0]\n") unless scalar @ARGV == 0;In the first example, we exit with an error code of 2, if we have supplied less than one command-line argument. The bash equivalent to this will be:
[ $# -lt 1 ] && exit 2
In the second example, we will only print the hello statement if we have supplied arguments. This will be written in bash, as shown in the following example:
[ $# -eq 0 ] || echo "Hello $1"
Personally, I like Perl...