Power Fx function
Not ! — Power Fx function reference
Invert a condition.
Syntax
powerfx
Not( Logical ) / !Logical
Examples
powerfx
Not(IsBlank(txtName.Text))
→ true / false
powerfx
Not(IsBlank(txtName.Text))
powerfx
!frmTask.Valid
Common mistakes & gotchas
- ! binds tightly to the next term only — !IsBlank(a) && b negates just IsBlank(a), which is usually intended, but add parentheses when negating a longer expression.
- Not(Blank()) evaluates to true because blank coerces to false first — surprising when the value is genuinely missing rather than an explicit false.
Related Power Fx functions
From Conditional logic