What does | mean in c language?

The meaning of "|" in C language

In C language, the "|" symbol is a bitwise OR operator. It performs the following operations:

Bitwise OR operation

The bitwise OR operation compares the corresponding bits of two binary numbers and gives the following result:

• If both bits are 1, the result is 1.
• Otherwise, the result is 0.

For example, 10 (01010) and 5 (00101) are bitwise ORed:

<code>01010 | 00101
--------
01111</code>

The result is 01111 (15).

Syntax

The syntax of the bitwise OR operation is as follows:

<code class="c">expression1 | expression2</code>

Among them, expression1 and expression2 are two integer expressions that need to be ORed.

Application

The bitwise OR operation is widely used in the following situations:

• Set the flag bit
• Extract the bit mask Code
• Perform Boolean logical operation
• Mask data

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