'c';                      
'hello';                  
"hello";
'Hi $name. How are you?'; 
"Hi $name. How are you?"; 
'\n';                     
"\n";                     
`ls`;                     
q/hello/;                 
qq/hello/;                
qw/one two three/;        
qx/ls/;                   
qr/regex/;                
<<END;                    
Hi, whatever goes here gets put into the string,
including newlines and $variables,
until the label we put above
END
<<'END';                  
Same as above, but no interpolation of $variables.
END