What % and & in this code?

Question

I wonder what % and & in the following PHP code do.

$num_one = rand() % 10;
$num_two = rand() & 10;

Thanks in advance.

Answer 1

% is modulus (remainder after division).

& is bitwise and.

Answer 2

& is the bitwise AND operator. % is the modulus (remainder of rand() / 10 in this case).

Answer 3

& is a bitwise operator. click me

% is an arithmetic operator. click me

Answer 4

% is modulo, so

$num_one = rand() % 10

gives you a number between in [0..10), while & means bitwise and, such that

$num_one = rand() & 10

gives you a random number with only a combination of the bits 2 and 4 set, like in [2,8,10].