---
title: "-=(_:_:)"
framework: foundation
role: symbol
role_heading: Operator
path: "foundation/runloop/schedulertimetype/stride/-=(_:_:)"
---

# -=(_:_:)

Subtracts the second stride from the first and assigns the result to the first.

## Declaration

```swift
static func -= (lhs: inout RunLoop.SchedulerTimeType.Stride, rhs: RunLoop.SchedulerTimeType.Stride)
```