The data descriptor Dw.d is exactly equivalent to Ew.d on input; on output it is similar except that the exponent will use the letter D instead of E. Real and double precision data items can be read equally well by D, E, F, or G descriptors.
The format descriptor
nHstring is exactly equivalent to
'string'
(where n is an unsigned integer constant giving the length of the
string). When used with a formatted WRITE statement the string
is copied to the output record. The nH form does not require
apostrophes to be doubled within the string but does require an
accurate character count.