Augmented assignment

<p>Augmented assignment (or compound assignment) is the name given to certain 
<a href="/facts/Assignment_(computer_science)/kLevAoyJ">assignment</a> <a href="/facts/Operator_(programming)/7TnU5LKu">operators</a> in certain <a href="/facts/Programming_languages/cWTYbgWa">programming languages</a> (especially those derived from <a href="/facts/C_(programming_language)/Ky2No763">C</a>). An augmented assignment is generally used to replace a statement where an operator takes a <a href="/facts/Variable_(programming)/VoCKtwml">variable</a> as one of its arguments and then assigns the result back to the same variable. A simple example is x += 1 which is expanded to x = x + 1. Similar constructions are often available for various binary operators.
</p><p>In general, in languages offering this feature, most operators that can take a variable as one of their arguments and return a result of the same type have an augmented assignment equivalent that assigns the result back to the variable in place, including arithmetic operators, bitshift operators, and <a href="/facts/Bitwise_operation/0gkqnUda">bitwise operators</a>.
</p>

Augmented assignment open-in-new

Augmented assignment