Monitor[expr, mon] generates a temporary monitor cell in which the continually updated current value of mon is displayed during the course of evaluation of expr.
Monitor[Table[e, {x, ...}], x] generates a monitor cell that shows the continually updated current value of x during the evaluation of the Table.
In a notebook, the monitor cell normally appears directly after the cell in which Monitor[expr, mon] is evaluated. The cell is deleted as soon as the evaluation of expr is complete.
If Print, PrintTemporary or similar output is generated before the evaluation of Monitor begins, it will appear before the monitor cell.
Any expression, including graphics and controls, can be given for mon.
EXAMPLES
Basic Examples 
Applications 