what is the keyboard code for the subscript of the letter  a in word. I
cannot find any subscript of a  in the symbol section. I need to get
the code so that i can assign it to a key in oder to speed my work
which need a lot of subscript. Once i get the code , how do i assign
it as it is not in the repertoire of symbols. Do i need to import it
from some file for e.g ?

I found the superscript of "a" in times new roman font, but not
subscript. (alt+0170)

The short cut to make highlighted text or following text superscript
in word is ctrl = (control and equal sign)

actually for programmer we always think that for A-65 and for a-97
ascii of asign key and we have 128 or 256 assigned keys but. now that
are very old fashion matter we can colour a single character. we can
give the hyperlink ot a character or word or line. so that way
subscript and superscript is simply a format of perticular character
or word. there arent a specially assign key for that. and if you know
HTML language then you also aware with sub ans sup tags which also
make latter in sub or super script. i thing you got answer.