Power Fx function
Errors and blanks
Coalesce
First non-blank value wins.
What it does
First non-blank value wins.
The job: Detect missing values and failed operations before they silently break a formula.
Try this
Adapt this formula from the nextM365 reference hub:
"Hello, " & Coalesce(txtName.Text, "guest")How to use Coalesce
Start from the task, not the alphabet. If you are shaping rows for a gallery, reach for Coalesce 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.