Hello every body, I do this code

Question

<? Php
Var_dump(5&4);
?>

And the result is:
Int(4)

I don't understand what mean that can any one explain what you mean that and thank in advance.

Answer 1

& is a bitwise operator ,its convert int to binary form
5=0101
4=0100
0101 & 0100 =0100
And 0100=4