Compound Assignment

Compound assignment is syntactic sugar to shorten expressions in which a binary operation (such as addition) uses a variable for the left-hand side, then assigns the result back to that variable.

More generally, it expands a OP= b into a = a OP b, where OP is any supported binary operator.

Syntax

All binary arithmetic and logic operators support compound assignment using a second set of operators. Simply suffix the operation with = like the following:

<$a = 10>

<a *= 10> # desugars into: <a = <a> * 10>
<a += 1> # desugars into: <a = <a> + 1>
# etc...

Supported operators