Why would someone use $-sign?

[Mafukufuku]

Hi, I am working through a long worksheet with data. It is made for me by
someone else. It has about 2300 rows. In Column C are measuring results,
Bottom field of this column(C2300) has the median of this column. Column D
has for every row the function =(C1-C2300) to measure the difference of that
value to the median of the column. But in column D the maker uses this
notation: =(C1-$C$2300)
\
Why the dollar signs? Is it to be able to pull the function down over the
whole column D of 2300 fields without C2300 changing into C2301 C2302 etc?
Thanks

 

[trip_to_tokyo]

It fixes that particular cell so that it you copy it to elsewhere that cell
reference ($C$2300) will remain the same (it will not change as it is moved).

If my comments have helped please hit Yes.

Thanks.

 

[trip_to_tokyo]

It fixes that particular cell so that IF you copy it to elsewhere that cell
reference ($C$2300) will remain the same (it will not change as it is moved).

Sorry for error in earlier posting.

 

[ozgrid.com]

Read up on why here
http://www.ozgrid.com/Excel/free-training/excel-lesson-16-basic.htm
after that;
http://www.ozgrid.com/Excel/excel-fill-handle.htm