What does | mean in c++

The bitwise OR (|) operator performs an OR operation on each bit of a binary number: if a certain bit of both is 1, the bit in the result is 1; if a certain bit of the two If one bit is 0, then the bit in the result is 0. It is used to: extract bits set bits clear bits test bits

in C | Meaning of

in C , the | symbol represents the "bitwise OR" operator, which performs an OR operation on each bit of two binary numbers.

How to perform a bitwise OR operation

When two binary numbers are operated using the bitwise OR operator, each of their bits is compared individually:

• If a certain bit of both is 1, the bit in the result is 1.
• If one of the two bits is 0, the bit in the result will be 0.

Example

Consider the following two binary numbers:

A = 01001101
B = 10011011

Perform a bitwise OR operation on them:

<code>A | B = 01001101
    | 10011011
-------
    = 11011111</code>

The result is 11011111.

Use of bitwise OR operation

Bitwise OR operation is very useful in the following situations:

• Extract bits: with the corresponding position A bitwise OR operation is performed on the mask to extract specific bits in the target number.
• Set bit: Perform a bitwise OR operation with the mask at the corresponding position to set a specific bit in the target number.
• Clear bits: Perform a bitwise OR operation with the negation mask to clear specific bits in the target number.
• Test bit: Perform a bitwise OR operation with the mask at the corresponding position to test whether a specific bit in the target number is 1.

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