Hey guys. Can some one explain how this code works? I don't know what does this single & operator do.

Question

int x=15;
int y=7;
if((++x<=15) & (y++==7)){
Console.Write(x);
}
else{
Console.Write(y);
}

Answer 1

Single & operator is known as bitwise AND. It performs AND logic bit by bit. For example:

6 & 3
= 110 & 011 (binary equivalence of 6 and 3)
= (1&0)(1&1)(0&1)
= 010
= 2

For the given program, the operands have only one bit each.

(++x <= 15) & (y++ == 7)
= (16 <= 15) & (7 == 7) // y is 8 but y++ is 7
= 0 & 1
= 0

So, if condition is FALSE, and thus the else body is executed which prints 8 (current value of y)

Answer 2

&& is logical operator
and
& is binary operator(and gate)
at your code
(16<=15)&(7==7)
false & true
false

then print y value out
understand?