---
title: "isEqual(_:)"
framework: Professional Video Applications
role: symbol
role_heading: Instance Method
platforms: [fxplug 4.0+]
path: "professional_video_applications/fxcustomparameterinterpolation_v2/isequal(_:)"
---

# isEqual(_:)

Returns whether one custom parameter value is equal to another.

## Declaration

```swift
func isEqual(_ rightValue: any NSCopying & NSSecureCoding & NSObjectProtocol) -> Bool
```

## Parameters

- `rightValue`: The value to the right of the equal sign in the equation (leftValue == rightValue).

## Return Value

Return Value True if the two values are equal, false otherwise.

## Discussion

Discussion The host application will sometimes need to know whether two custom parameters are equivalent. When it needs to know that, it will call this method on one custom parameter object, and pass it the other as rightValue.

## See Also

### Instance Methods

- [interpolateBetween(_:withWeight:)](professional_video_applications/fxcustomparameterinterpolation_v2/interpolatebetween(_:withweight:).md)