Get introduced to semantics in this lesson.

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Merely understanding how these operators work at bit-level may not be sufficient to see how they are useful in programs. The following sections describe common ways that these operators are used.

| is a union set

The | operator produces the union of the 1 bits in the two expressions.

As an extreme example, let’s consider two values that both have alternating bits set to 1. The union of these values would produce a result where all of the bits are 1:

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