### Data rouding
When you use segment, you find that the results on the measurement line are inconsistent with the results displayed in the list. As shown below：
The lengths of the two lines on the left in the figure above are 0.88m and 0.70m respectively, and the sum of the two is 1.58m, while the list on the right shows that the sum of the lengths is 1.59m, and the two data are not equal.
The reason for this phenomenon is the rounding of the data.
A. The sum of the data displayed on the left measurement line is 1.58m:
0.88m is actually 0.883m, rounded to 0.88m
0.70m is actually 0.704m, rounded to 0.70m
B. The data in the list is the sum of the actual data of the two is 1.59m：
0.883m+0.704m=1.587m，rounds to 1.59m
Therefore, the data of A and B are different.
This difference will not exceed the range of ±1, and the result in the list on the right shall prevail.