What does & mean in c language

The

& symbol is the bitwise AND operator in C language, used to compare two binary values ​​bit by bit and return the result. Applications include extracting specific bits, checking bit 1, and clearing bits.

The meaning of the & symbol in C language

& The function of the symbol: # The

##& symbol is the bitwise AND operator in C language, which is used to compare two binary values ​​bit by bit and return a new value. Each bit in the result value is the result of an AND operation with the corresponding bits of the two input values.

Rules for bitwise AND operation:

If both bits are 0, the result bit is 0.
• If both bits are 1, the result bit is 1.
• If the two bits are different (one is 0 and one is 1), the resulting bit is 0.

Example:

Suppose we have the following two 8-bit binary numbers:

A = 01101011
B = 10100101

Use the & sign to do a bitwise AND of them Operation, the following results are obtained:

A & B = 00100001

Application of bitwise AND operation:

Bitwise AND operation has a wide range of applications in C language programming, including:

Extract specific bits in a binary number: You can AND a binary number with a mask to extract its bits at specific positions. For example, ANDing a number with 0x01 extracts its least significant bits.
• Check if a bit is 1: You can check if a bit is 1 by ANDing a binary number with a constant. For example, ANDing a number with 0x02 checks whether its second bit is 1.
• Clear bits: You can clear a bit at a specific position of a binary number by ANDing it with its complement. For example, ANDing a number with 0xFFFE clears its least significant bits.

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