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Verse API reference page for the operator'-=' function

Verse using statement using { /Verse.org/Verse }

operator'-='(Lhs:int, Rhs:int)<transacts><predicts>:int

Parameters

operator'-=' takes the following parameters:

Name Type Description
Lhs int
Rhs int

Attributes, Specifiers, and Effects

Specifiers

The following specifiers determine how you can interact with operator'-=' in your programs. For the complete list of specifiers, see the Specifiers Page.

Effects

The following effects determine how operator'-=' behaves in your programs. For the complete list of effects, see the Effect Specifers section of the Specifiers Page.

Effect Meaning
transacts This effect indicates that any actions performed by the function can be rolled back. The transacts effect is required any time a mutable variable (var) is written. You'll be notified when you compile your code if the transacts effect was added to a function that can't be rolled back. Note that this check is not done for functions with the native specifier.
predicts

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    Last updated Feb 10, 2026
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