Operator

+(_:_:)

Adds two values and produces their sum.

Required.

Declaration

override static func + (lhs: Self, rhs: Self) -> Self

Parameters

lhs

The first value to add.

rhs

The second value to add.

Discussion

The addition operator (+) calculates the sum of its two arguments. For example:

1 + 2                   // 3
-10 + 15                // 5
-15 + -5                // -20
21.5 + 3.25             // 24.75

You cannot use + with arguments of different types. To add values of different types, convert one of the values to the other value’s type.

let x: Int8 = 21
let y: Int = 1000000
Int(x) + y              // 1000021