The bitwise inclusive OR operator (|) returns the bitwise inclusive OR of the two operands. All bits that are on (1) in either the left or right operand are on in the result. Bits that are off (0) in both operands are off in the result.
Syntax
inclusive-or-expression :
exclusive-or-expression
inclusive-or-expression | exclusive-or-expression
Both operands to the bitwise inclusive OR operator must be of integral types. The usual arithmetic conversions covered in Arithmetic Conversions in Chapter 3 are applied to the operands.