A string literal is enclosed in quotes and has its own data type. A string literal must be contained in a single line unless the new line is immediately preceded by a \. Non-printing and other special characters are preceded with a backslash. String literals can also be cast to a packed or unpacked array. SystemVerilog added following special string characters.

• \v vertical tab
• \f form feed
• \a bell
• \x02 hex number

  1 `timescale 1ns/100ps
  2 module string_literals ();
  3 
  4 string  a;
  5 
  6 initial begin
  7   $display ("@ %gns a = %s", $time, a);
  8   a = "Hello Deepak";
  9   $display ("@ %gns a = %s", $time, a);
 10    #1  a = "Over writing old string";
 11   $display ("@ %gns a = %s", $time, a);
 12    #1  a = "This is multi line comment \
" 13           and this is second line";
" 14   $display ("@ %gns a = %s", $time, a);
 15    #1  $finish;
 16 end
 17 
 18 endmodule

  @ 0ns a =
  @ 0ns a = Hello Deepak
  @ 1ns a = Over writing old string
  @ 2ns a = This is multi line comment
            and this is second line

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