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

# -(_:_:)

Subtracts one value from another and produces their difference, rounded to a representable value.

## Declaration

```swift
static func - (lhs: Float, rhs: Float) -> Float
```

## Parameters

- `lhs`: A numeric value.
- `rhs`: The value to subtract from lhs.

## Discussion

Discussion The subtraction operator (-) calculates the difference of its two arguments. For example: let x = 7.5 let y = x - 2.25 // y == 5.25 The - operator implements the subtraction operation defined by the IEEE 754 specification.