This documentation is archived and is not being maintained.

Bitwise OR Assignment Operator (|=)

Performs a bitwise OR on the value of a variable and the value of an expression and assigns the result to the variable.

result |= expression


Any numeric variable.
Any numeric expression.


Using this operator is almost the same as specifying result = result | expression, except that result is only evaluated once.

The |= operator coerces the arguments to matching data types. Then the |= operator looks at the binary representation of the values of result and expression and does a bitwise OR operation on them. The result of this operation behaves like this:

0101    (result)
1100    (expression)
1101    (output)

Any time either of the expressions has a 1 in a digit, the result has a 1 in that digit. Otherwise, the result has a 0 in that digit.


Version 1

See Also

Bitwise OR Operator (|) | Assignment Operator (=) | Operator Precedence | Operator Summary | Coercion By Bitwise Operators