Errors Rounding means shortening the fractional part of the number.
Computer programs have a limit to the amount of precision that numbers can be stored.
Although rounding errors may appear to be a trivial problem, the cumulative effect of rounding errors can have a significant impact on numerical calculations. To illustrate this point, the following example has been created. In each successive row, one significant digit is dropped and the numbers are rounded. By comparing the products of the four numbers in each successive row, the effect of rounding errors can be seen. Note the difference between the products in the first and last row.