javascript - Check if two integers have the same sign

Question

I'm searching for an efficient way to check if two numbers have the same sign.

Basically I'm searching for a more elegant way than this:

var n1 = 1;
var n2 = -1;

( (n1 > 0 && n2 > 0) || (n1<0 && n2 < 0) )? console.log("equal sign"):console.log("different sign");

A solution with bitwise operators would be fine too.

Answer 1

You can multiply them together; if they have the same sign, the result will be positive.

bool sameSign = (n1 * n2) > 0