# ColumnProtocol A type that represents a column. ``` protocol ColumnProtocol : BidirectionalCollection ``` ## Overview `ColumnProtocol` defines the common functionality for typed column types. Its type-erased counterpart is [`AnyColumnProtocol`](/documentation/TabularData/AnyColumnProtocol). ## Topics ### Inspecting a Column Type [`var name: String`](/documentation/TabularData/ColumnProtocol/name) The name of the column. ### Generating a Column by Adding Two Columns [`static func + (Self, Self) -> Column`](/documentation/TabularData/ColumnProtocol/+(_:_:)-yc11) Generates a column by adding each element in a column type to the corresponding elements of another. [`func + (L, R) -> Column`](/documentation/TabularData/+(_:_:)-1i7oh) Generates a column by adding each element in a column type to the corresponding elements of an optional column type. [`func + (L, R) -> Column`](/documentation/TabularData/+(_:_:)-3exmp) Generates a column by adding each element in an optional column type to the corresponding elements of a column type. ### Generating a Column by Subtracting Two Columns [`static func - (Self, Self) -> Column`](/documentation/TabularData/ColumnProtocol/-(_:_:)-36zol) Generates a column by subtracting each element in a column type from the corresponding elements of another. [`func - (L, R) -> Column`](/documentation/TabularData/-(_:_:)-25cs6) Generates a column by subtracting each element in an optional column type from the corresponding elements of a column type. [`func - (L, R) -> Column`](/documentation/TabularData/-(_:_:)-95yoe) Generates a column by subtracting each element in a column type from the corresponding elements of an optional column. ### Generating a Column by Multiplying Two Columns [`static func * (Self, Self) -> Column`](/documentation/TabularData/ColumnProtocol/*(_:_:)-9db1q) Generates a column by multiplying each element in a column type by the corresponding elements of another. [`func * (L, R) -> Column`](/documentation/TabularData/*(_:_:)-l9r3) Generates a column by multiplying each element in a column type by the corresponding elements of an optional column type. [`func * (L, R) -> Column`](/documentation/TabularData/*(_:_:)-2toor) Generates a column by multiplying each element in an optional column type by the corresponding elements of a column type. ### Generating a Column by Dividing Two Columns [`static func / (Self, Self) -> Column`](/documentation/TabularData/ColumnProtocol/_(_:_:)-922ku) Generates an integer column by dividing each element in a column type by the corresponding elements of another. [`func / (L, R) -> Column`](/documentation/TabularData/_(_:_:)-9v3nw) Generates an integer column by dividing each element in a column type by the corresponding elements of an optional column type. [`func / (L, R) -> Column`](/documentation/TabularData/_(_:_:)-4igyw) Generates an integer column by dividing each element in an optional column type by the corresponding elements of a column type. [`static func / (Self, Self) -> Column`](/documentation/TabularData/ColumnProtocol/_(_:_:)-2urf0) Generates a floating-point column by dividing each element in a column type by the corresponding elements of another. [`func / (L, R) -> Column`](/documentation/TabularData/_(_:_:)-4pr65) Generates a floating-point column by dividing each element in a column type by the corresponding elements of an optional column type. [`func / (L, R) -> Column`](/documentation/TabularData/_(_:_:)-58kg6) Generates a floating-point column by dividing each element in an optional column type by the corresponding elements of a column type. ### Generating a Column by Combining a Value [`static func + (Self, Self.Element) -> Column`](/documentation/TabularData/ColumnProtocol/+(_:_:)-39k8v) Generates a column by adding a value to each element in a column. [`static func + (Self.Element, Self) -> Column`](/documentation/TabularData/ColumnProtocol/+(_:_:)-94kiv) Generates a column by adding each element in a column to a value. [`static func - (Self.Element, Self) -> Column`](/documentation/TabularData/ColumnProtocol/-(_:_:)-4fynh) Generates a column by subtracting each element in a column from a value. [`static func - (Self, Self.Element) -> Column`](/documentation/TabularData/ColumnProtocol/-(_:_:)-6up21) Generates a column by subtracting a value from each element in a column. [`static func * (Self, Self.Element) -> Column`](/documentation/TabularData/ColumnProtocol/*(_:_:)-17vqd) Generates a column by multiplying each element in a column by a value. [`static func * (Self.Element, Self) -> Column`](/documentation/TabularData/ColumnProtocol/*(_:_:)-3d6lu) Generates a column by multiplying a value by each element in a column. [`static func / (Self, Self.Element) -> Column`](/documentation/TabularData/ColumnProtocol/_(_:_:)-4a632) Generates an integer column by dividing each element in a column by a value. [`static func / (Self.Element, Self) -> Column`](/documentation/TabularData/ColumnProtocol/_(_:_:)-7pe3t) Generates an integer column by dividing a value by each element in a column. [`static func / (Self, Self.Element) -> Column`](/documentation/TabularData/ColumnProtocol/_(_:_:)-6zigz) Generates a floating-point column by dividing each element in a column by a value. [`static func / (Self.Element, Self) -> Column`](/documentation/TabularData/ColumnProtocol/_(_:_:)-4iv15) Generates a floating-point column by dividing a value by each element in a column. ### Comparing a Column with a Value [`static func == (Self, Self.Element) -> [Bool]`](/documentation/TabularData/ColumnProtocol/==(_:_:)-5jc0x) Returns a Boolean array that indicates whether the corresponding element of a column type is equal to a value. [`static func == (Self.Element, Self) -> [Bool]`](/documentation/TabularData/ColumnProtocol/==(_:_:)-4hx04) Returns a Boolean array that indicates whether the value is equal to the corresponding element of a column type. [`static func != (Self, Self.Element) -> [Bool]`](/documentation/TabularData/ColumnProtocol/!=(_:_:)-557vb) Returns a Boolean array that indicates whether the corresponding element of a column type isn’t equal to a value. [`static func != (Self.Element, Self) -> [Bool]`](/documentation/TabularData/ColumnProtocol/!=(_:_:)-72ddh) Returns a Boolean array that indicates whether the value isn’t equal to the corresponding element of a column type. ### Operators [`static func > (Self.Element, Self) -> [Bool]`](/documentation/TabularData/ColumnProtocol/_(_:_:)-68any) Returns a Boolean array that indicates whether the value is greater than the corresponding element of a column type. [`static func < (Self.Element, Self) -> [Bool]`](/documentation/TabularData/ColumnProtocol/_(_:_:)-70vl1) Returns a Boolean array that indicates whether the value is less than the corresponding element of a column type. [`static func < (Self, Self.Element) -> [Bool]`](/documentation/TabularData/ColumnProtocol/_(_:_:)-7gy2j) Returns a Boolean array that indicates whether the corresponding element of a column type is less than a value. [`static func > (Self, Self.Element) -> [Bool]`](/documentation/TabularData/ColumnProtocol/_(_:_:)-9rct2) Returns a Boolean array that indicates whether the corresponding element of a column type is greater than a value. [`static func <= (Self.Element, Self) -> [Bool]`](/documentation/TabularData/ColumnProtocol/_=(_:_:)-17m6l) Returns a Boolean array that indicates whether the value is less than or equal to the corresponding element of a column type. [`static func >= (Self, Self.Element) -> [Bool]`](/documentation/TabularData/ColumnProtocol/_=(_:_:)-2w8gt) Returns a Boolean array that indicates whether the corresponding element of a column type is greater than or equal to a value. [`static func >= (Self.Element, Self) -> [Bool]`](/documentation/TabularData/ColumnProtocol/_=(_:_:)-8jak4) Returns a Boolean array that indicates whether the value is greater than or equal to the corresponding element of a column type. [`static func <= (Self, Self.Element) -> [Bool]`](/documentation/TabularData/ColumnProtocol/_=(_:_:)-9wr8s) Returns a Boolean array that indicates whether the corresponding element of a column type is less than or equal to a value. ## Relationships ### Conforming Types [`ColumnSlice`](/documentation/TabularData/ColumnSlice) [`DiscontiguousColumnSlice`](/documentation/TabularData/DiscontiguousColumnSlice) [`Column`](/documentation/TabularData/Column) [`FilledColumn`](/documentation/TabularData/FilledColumn) ### Inherits From [`BidirectionalCollection`](/documentation/Swift/BidirectionalCollection) [`Sequence`](/documentation/Swift/Sequence) [`Collection`](/documentation/Swift/Collection) ### Inherited By [`OptionalColumnProtocol`](/documentation/TabularData/OptionalColumnProtocol) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)