Difference between "perl" and "perl -w"?
perl
Solution
That is not perl code, it's a shebang, which is used in a linux/unix environment as a way to tell the shell what program should be used to run the program file. It has no effect in windows, but it does activate any switches used.
The `-w` part is a switch for perl, telling it to activate warnings. You can learn more about perl's command line switches by typing `perl -h` at the command prompt. Read more in `perldoc perlrun`
`-w` is the older version of the `use warnings` pragma, which is preferred nowadays. While `-w` is global, `use warnings` is lexical, and can be activated selectively.
Problem
I am learning Perl , very new user . May i know whats the difference between these Perl codes. ``` #!/usr/bin/perl ``` & ``` #!/usr/bin/perl -w ```