Type.IsNullable
This topic applies to the Power Query Formula Language which can be used with Power Query and Power BI Desktop to build queries that mashup data. See the list of function categories.
Returns true if a type is a nullable type; otherwise, false.
Type.IsNullable(#"type" as type) as logical
Type.IsNullable(type nullable number) equals true
Type.IsNullable(number) equals false
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