Comments

Study what comments are and how we should write them.

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We need to add comments in our code to make it more readable for the reader. Comments in Perl are of two types:

  • Single line comment
  • Multiline comment

Single line comment

If our comment can fit on a single line, then we can use a # symbol.

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# this is a single line comment
print "Hello World";   # This line prints Hello World

Explanation

We use the # symbol for a single line comment. We can use multiple instances of # symbols in our code to comment on multiple single lines.

Multiline comment

If there is a paragraph or functionality which takes more than one line explanation then we can use a multiline comment which starts with = (followed by some text ) and ends with =cut.

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=POD
this
is a 
multiline 
comment
=cut

Explanation

A multiline comment starts with =(text) sign and ends with =cut keyword. You can write anything between these lines and it will not be executed.

It is a common convention to start a multiline comment with =POD and end at =cut