Label Arcgis pro and arcgis online

[RosialineMarques_Roedel]

Label on Arcgis pro and arcgis on line. I'm having difficulties in labeling my points / features with numbers just considering the significant digits.

[MervynLotter]

A little bit of code from Arcade will do the trick.

From the Labelling tab and Label Class group in ArcGIS Pro, click on the Expressions function. 

This will open the Labelling pane with the Label expression subtab. 

Just modify the code in the Expression box by adding Round at the start and put the $feature in brackets and then stipulate how many significant digits, like this  Round($feature.Size_ha,2)

[TimOrmsby]

For reference, this is documented in the help topic Specify text for labels, in the section Expression examples, second bullet point.