Metacharacters

These need to be escaped to be matched.

\ . ^ $ * + ? { } [ ] ( ) | Escape sequences for pre-defined character classes \d – a digit – [0-9] \D – a nondigit – [^0-9] \w – a word character (alphanumeric including underscore) – [a-zA-Z_0-9] \W – a nonword [...]

Declare a local variable called $mystring.

my $mystring;

Assign a value (string literal) to the variable.

$mystring = “Hello world!”;

Does the string contains the word “World”?

if($mystring =~ m/World/) { print “Yes”; }

No, it doesn’t. The binding operator 

=~

with the match operator 

m//

does a pattern search on 

$mystring

and returns true [...]