Just for the heck of it I looked up code using www.dictionary.com and one of the definitions that pertains to the type you write while programming is

"code

n. The stuff that software writers write, either in
source form or after translation by a compiler or assembler. Often
used in opposition to "data", which is the stuff that code operates
on. This is a mass noun, as in "How much code does it take to do a
bubble sort?", or "The code is loaded at the high end of RAM."
Anyone referring to software as "the software codes" is probably a
newbie or a suit.
"

Note: I added the bolding to empisize something that is definantly true :).