---
title: "+=(_:_:)"
framework: tabulardata
role: symbol
role_heading: Operator
path: "tabulardata/column/+=(_:_:)-2scuy"
---

# +=(_:_:)

Modifies a column by adding each optional value in a collection to the corresponding element in the column.

## Declaration

```swift
static func += <C>(lhs: inout Column<WrappedElement>, rhs: C) where WrappedElement : AdditiveArithmetic, C : Collection, C.Element == WrappedElement?
```

## Parameters

- `lhs`: A column.
- `rhs`: A collection that contains elements of the same type as the column’s elements.

## See Also

### Modifying a Column with a Collection of Values

- [+=(_:_:)](tabulardata/column/+=(_:_:)-2w5o4.md)
- [-=(_:_:)](tabulardata/column/-=(_:_:)-8rgjq.md)
- [-=(_:_:)](tabulardata/column/-=(_:_:)-3v0hh.md)
- [*=(_:_:)](tabulardata/column/*=(_:_:)-8mmnn.md)
- [*=(_:_:)](tabulardata/column/*=(_:_:)-6kp11.md)
- [/=(_:_:)](tabulardata/column/_=(_:_:)-dnma.md)
- [/=(_:_:)](tabulardata/column/_=(_:_:)-8xhzg.md)
- [/=(_:_:)](tabulardata/column/_=(_:_:)-86t1j.md)
- [/=(_:_:)](tabulardata/column/_=(_:_:)-3acz8.md)