What does amp mean in c language

& is a bitwise AND operator in C language, used to compare two operands bit by bit. If the corresponding bits are both 1, the result bit is 1, otherwise it is 0. Specific application scenarios include: testing whether a specific bit is 1, setting a specific bit to 0, and masking a specific bit.

##What is & in C language

& In C language it is a bitwise AND operator. It performs a bitwise comparison of each bit of the two operands, and if both bits are 1, the result is 1, otherwise it is 0.

How the bitwise AND operator works

a and b:

<code>a = 0b10101101
b = 0b01101011</code>

a and b, we compare each bit:

<code>1 & 0 = 0
0 & 1 = 0
1 & 1 = 1
0 & 0 = 0
1 & 1 = 1
1 & 0 = 0
0 & 1 = 0
1 & 1 = 1</code>

a & The result of b is:

<code>0b00101001</code>

Scenarios using bitwise AND operator

Test whether a specific bit is 1: If
• a & (1 << n) is 1, it means the nth of a bit is 1.
Set the specific bit to 0: If
• a & ~(1 << n) is used, it means that the n of a bit cleared.
Mask specific bits: If
• a & MASK is used, where MASK is a mask, it means a will be neutralized with Bits that differ from MASK are cleared.

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