An example of an absolute cell reference would be $C$4, $G$15, or $A$345.
Note: An absolute cell reference is used when you want a cell reference to stay fixed on a specific cell. This means that as a formula or function is copied and pasted to other cells, the cell references in the formula or function do not change.
By contrast, most cell references in a spreadsheet are relative cell references, which change when copied and pasted to other cells.
$A$1 (absolute column and absolute row) - $A$1 (the reference is absolute)
A$1 (relative column and absolute row) - C$1 (the reference is mixed)
$A1 (absolute column and relative row) - $A3 (the reference is mixed)
A1 (relative column and relative row) - C3 (the reference is relative)
For example see figure 1:
In Figure 1, for copy data from cell A2 to D2, type formula =A2 and press enter. Data are copy successfully but when we try to copy this data to another cell it not copy, it set cell value as 0. See figure 2.
Now, we copy data from cell A2 to D2 using absolute formula. Type formula =$A$2 into D2 cell (Figure 3) and press enter. Data are copy successfully and when we try to copy this data to another cell it copy successfully, See figure 4.