What are significant digits (figures)?
Significant digits are the number of meaningful digits in a number. More significant digits means the value is know more precisely. For example “5.” has one significant digit and implies a value is between 4.5 and 5.5; while, “4.8” has 2 significant digits and implies a value is between 4.75 and 4.85 and is more precise. 4.81950 inches has six significant digits and implies a range of 4.819495 to 4.819505 inches. The following table should clarify this.
