Perl Strings

'Hello World!'      # Returns 'Hello World!', supports escaping of ' and \
'It\'s\\It is'      # Returns 'It's\It is'
'Don\'t "escape"'   # Returns 'Don't "escape"'
'Hello\nWorld!'     # Returns 'Hello\nWorld!'

"Hello World!"      # Returns 'Hello World!', supports escaping multiple
                    # characters, including \n and \t, and interpolation
"Hello\nWorld!"     # Returns 'Hello
                    #          World!'

'Hello' . ' ' . 'World!' # Returns 'Hello World!'

$hi = "Hello";
# The two types of interpolation are equivalent. The first type is used
# for variable names that would cause ambiguity.
"${hi} World!"      # Returns 'Hello World!'
"$hi World!"        # Returns 'Hello World!'