'c';                      
'hello';                  
;
'Hi $name. How are you?'; 
; 
'\n';                     
;                     
`ls`;                     
<<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;