NOT

NOT([Effort] == 0)

Syntax

NOT({logical expression})

Logical function returns TRUE if the provided argument is logically false, and FALSE if the provided argument is logically true.

logical expression: An expression that produces a Boolean value when evaluated, i.e. one of TRUE or FALSE. The combination of data fields, constants, text, numeric and date expressions with logical operators >,<,>=, <=, != and etc. can be used to create logical expressions