infix operator /= { associativity right precedence 90 assignment } Declarations func /=(inout: Double, rhs: Double) Declaration func /=(inout lhs: Double, rhs: Double) func /=(inout: Float, rhs: Float) Declaration func /=(inout lhs: Float, rhs: Float) func /=(inout: Float80, rhs: Float80) Declaration func /=(inout lhs: Float80, rhs: Float80) func /= <T : _IntegerArithmeticType>(inout: T, rhs: T) divide lhs and rhs and store the result in lhs, trapping in case of arithmetic overflow (except in -Ounchecked builds). Declaration func /=<T : _IntegerArithmeticType>(inout lhs: T, rhs: T)