How do I print a pattern in Perl?

print operator in Perl is used to print the values of the expressions in a List passed to it as an argument. Print operator prints whatever is passed to it as an argument whether it be a string, a number, a variable or anything. Double-quotes(“”) are used as a delimiter to this operator.

How do I match a regular expression in Perl?

There are three regular expression operators within Perl.

  1. Match Regular Expression – m//
  2. Substitute Regular Expression – s///
  3. Transliterate Regular Expression – tr///

How do I print a variable in Perl script?

In any real-world Perl script you’ll need to print the value of your Perl variables. To print a variable as part of a a string, just use the Perl printing syntax as shown in this example: $name = ‘Alvin’; print “Hello, world, from $name.

How do I print a hash in Perl?

print “$ perl_print_hash_variable{‘-hash_key2’} \n”; Description: The Perl print hash can used $ symbol for a single hash key and its value. The Perl print hash can use the % symbol for multiple hash keys and their values.

How do I print special characters in Perl?

my $var = “\\n”; $var =~s/\\//g; print “$'”; Else If you want print the \n . Just use the single quotes instead of double quotes. or use forward slashes within double quotes.

What is \s+ in Perl?

(\S+) | will match and capture any number (one or more) of non-space characters, followed by a space character (assuming the regular expression isn’t modified with a /x flag). In both cases, these constructs appear to be one component of an alternation.

What is S+ in Perl?

(\S+) | will match and capture any number (one or more) of non-space characters, followed by a space character (assuming the regular expression isn’t modified with a /x flag). In both cases, these constructs appear to be one component of an alternation. Breaking it down: ( …. ) : Group and capture.

How do I print numbers in Perl?

sprintf is used to print in a formatted way. Suppose you have a variable having a value of 3.14159, then by using sprintf function you can control the precision of digits after decimal while printing. It means that you can print only 3.14. printf can be used instead of print sprintf.

What is difference between print and printf in Perl?

print just outputs. printf takes a formatting string like “%3f” and uses it to format the output. sprintf is the same as printf except it doesn’t actually output anything. It returns a formatted string.