What does | mean in c language?

The | operator in C language is a bitwise logical OR operator, which is used to perform a bitwise OR operation on two binary numbers bit by bit: when both bits are 0, the result is 0; The result is 1 when one of the two bits is 1, and 1 when both bits are 1. It is commonly used to set flag bits, merge bitmaps, extract specific bits, and detect parity bits.

The | operator in C language

What is the | operator?

| operator is a bitwise operator in C language used to perform bitwise logical OR operations.

How does the bitwise logical OR operation work?

When the | operator operates on two binary numbers, it performs the following operations bit by bit:

• If both bits are 0, the result is 0.
• If one of the two bits is 1, the result is 1.
• If both bits are 1, the result is 1.

Syntax:

<code class="c">结果 = 操作数1 | 操作数2;</code>

Example:

Consider the following binary number:

• Operand 1: 1010 (2)
• Operand 2: 1011 (2)

Perform a bitwise OR operation:

<code>1010 (2) | 1011 (2)
-------
1011 (2)</code>

Therefore, the result is 1011(2), or 11 in decimal.

Purpose:

| Operators are widely used in C language programs, including:

• Setting flag bits
• Merge bitmap
• Extract specific bits
• Detect parity bit

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