Question

I am trying to create random longitude and latitudes. I need to create numbers between
-180.000 and +180.000. So, I might get 101.325 or -3.546 or -179.561.

Can you tell me a quick formula for that?

Thanks to everyone for your help. I have combined a couple of examples to suit my needs. Yes, I could shorten the code, but this really helps to see what’s going on.

// LONGITUDE -180 to + 180
function generateRandomLong() {
    var num = (Math.random()*180).toFixed(3);
    var posorneg = Math.floor(Math.random());
    if (posorneg == 0) {
        num = num * -1;
    }
    return num;
}
// LATITUDE -90 to +90
function generateRandomLat() {
    var num = (Math.random()*90).toFixed(3);
    var posorneg = Math.floor(Math.random());
    if (posorneg == 0) {
        num = num * -1;
    }
    return num;
}

Answer 1

function getRandomInRange(from, to, fixed) {
    return (Math.random() * (to - from) + from).toFixed(fixed) * 1;
    // .toFixed() returns string, so ' * 1' is a trick to convert to number
}

In your case: getRandomInRange(-180, 180, 3):

12.693
-164.602
-7.076
-37.286
52.347
-160.839