---
title: "*(_:_:)"
framework: swift
role: symbol
role_heading: Operator
path: "swift/int128/*(_:_:)"
---

# *(_:_:)

Multiplies two values and produces their product.

## Declaration

```swift
static func * (a: Int128, b: Int128) -> Int128
```

## Discussion

Discussion The multiplication operator (*) calculates the product of its two arguments. For example: 2 * 3                   // 6 100 * 21                // 2100 -10 * 15                // -150 3.5 * 2.25              // 7.875 You cannot use * with arguments of different types. To multiply 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              // 21000000