Perl uses single (') or double (") quotes to indicate the start and end of text strings.
Perl provides less interpretation of what's in a single-quoted string.
In a single-quoted string:
\n is two characters, a backslash and an n.
\' and \\ are the only allowed backslash escapes.
The value of variables are not substituted, so that '$var', for example, is simply a dollar sign and the letters v-a-r.
You can have a real newline in the text, such as the following:
'line 1
line 2'
Double quotes
You can use the full set of backslash escapes, such as \t for a tab and \n for a newline.
You can substitute the value of variables, such as $var.
You can also embed a newline in the string, as you can for single-quoted strings:
"line 1
line 2"