Power Fx function
Text, math, and dates
CountRows
Counts rows, plain and simple.
What it does
Counts rows, plain and simple.
The job: Everyday formatting and calculation, from Concatenate to DateDiff.
How to use CountRows
Start from the task, not the alphabet. If you are shaping rows for a gallery, reach for CountRows alongside the other data functions in its group; if you are saving, navigating, or changing state, use it on an event such as a button OnSelect rather than in a display property. When a formula misbehaves, check for a blank value where you expected text, then confirm the behaviour against the examples in the Power Fx function reference hub.
New to the language itself? Read What Is Microsoft Power Fx? first, then come back here when you need this specific tool.